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            <dia:string>#Next#</dia:string>
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        <dia:composite type="umloperation">
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            <dia:string>#IsDone#</dia:string>
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            <dia:string>#CurrentItem#</dia:string>
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          <dia:attribute name="comment">
            <dia:string>##</dia:string>
          </dia:attribute>
          <dia:attribute name="abstract">
            <dia:boolean val="false"/>
          </dia:attribute>
          <dia:attribute name="inheritance_type">
            <dia:enum val="2"/>
          </dia:attribute>
          <dia:attribute name="query">
            <dia:boolean val="false"/>
          </dia:attribute>
          <dia:attribute name="class_scope">
            <dia:boolean val="false"/>
          </dia:attribute>
          <dia:attribute name="parameters"/>
        </dia:composite>
        <dia:composite type="umloperation">
          <dia:attribute name="name">
            <dia:string>#IsDone#</dia:string>
          </dia:attribute>
          <dia:attribute name="stereotype">
            <dia:string>##</dia:string>
          </dia:attribute>
          <dia:attribute name="type">
            <dia:string>##</dia:string>
          </dia:attribute>
          <dia:attribute name="visibility">
            <dia:enum val="0"/>
          </dia:attribute>
          <dia:attribute name="comment">
            <dia:string>##</dia:string>
          </dia:attribute>
          <dia:attribute name="abstract">
            <dia:boolean val="false"/>
          </dia:attribute>
          <dia:attribute name="inheritance_type">
            <dia:enum val="2"/>
          </dia:attribute>
          <dia:attribute name="query">
            <dia:boolean val="false"/>
          </dia:attribute>
          <dia:attribute name="class_scope">
            <dia:boolean val="false"/>
          </dia:attribute>
          <dia:attribute name="parameters"/>
        </dia:composite>
        <dia:composite type="umloperation">
          <dia:attribute name="name">
            <dia:string>#CurrentItem#</dia:string>
          </dia:attribute>
          <dia:attribute name="stereotype">
            <dia:string>##</dia:string>
          </dia:attribute>
          <dia:attribute name="type">
            <dia:string>##</dia:string>
          </dia:attribute>
          <dia:attribute name="visibility">
            <dia:enum val="0"/>
          </dia:attribute>
          <dia:attribute name="comment">
            <dia:string>##</dia:string>
          </dia:attribute>
          <dia:attribute name="abstract">
            <dia:boolean val="false"/>
          </dia:attribute>
          <dia:attribute name="inheritance_type">
            <dia:enum val="2"/>
          </dia:attribute>
          <dia:attribute name="query">
            <dia:boolean val="false"/>
          </dia:attribute>
          <dia:attribute name="class_scope">
            <dia:boolean val="false"/>
          </dia:attribute>
          <dia:attribute name="parameters"/>
        </dia:composite>
      </dia:attribute>
      <dia:attribute name="template">
        <dia:boolean val="false"/>
      </dia:attribute>
      <dia:attribute name="templates"/>
    </dia:object>
    <dia:object type="UML - Generalization" version="1" id="O8">
      <dia:attribute name="obj_pos">
        <dia:point val="23.875,6.4"/>
      </dia:attribute>
      <dia:attribute name="obj_bb">
        <dia:rectangle val="20.4487,6.35;24.725,11.88"/>
      </dia:attribute>
      <dia:attribute name="meta">
        <dia:composite type="dict"/>
      </dia:attribute>
      <dia:attribute name="orth_points">
        <dia:point val="23.875,6.4"/>
        <dia:point val="23.875,9.2"/>
        <dia:point val="20.4987,9.2"/>
        <dia:point val="20.4987,11.83"/>
      </dia:attribute>
      <dia:attribute name="orth_orient">
        <dia:enum val="1"/>
        <dia:enum val="0"/>
        <dia:enum val="1"/>
      </dia:attribute>
      <dia:attribute name="orth_autoroute">
        <dia:boolean val="false"/>
      </dia:attribute>
      <dia:attribute name="text_colour">
        <dia:color val="#000000"/>
      </dia:attribute>
      <dia:attribute name="line_colour">
        <dia:color val="#000000"/>
      </dia:attribute>
      <dia:attribute name="name">
        <dia:string>##</dia:string>
      </dia:attribute>
      <dia:attribute name="stereotype">
        <dia:string>##</dia:string>
      </dia:attribute>
      <dia:connections>
        <dia:connection handle="0" to="O0" connection="6"/>
        <dia:connection handle="1" to="O4" connection="1"/>
      </dia:connections>
    </dia:object>
    <dia:object type="UML - Generalization" version="1" id="O9">
      <dia:attribute name="obj_pos">
        <dia:point val="23.875,6.4"/>
      </dia:attribute>
      <dia:attribute name="obj_bb">
        <dia:rectangle val="23.025,6.35;28.39,11.88"/>
      </dia:attribute>
      <dia:attribute name="meta">
        <dia:composite type="dict"/>
      </dia:attribute>
      <dia:attribute name="orth_points">
        <dia:point val="23.875,6.4"/>
        <dia:point val="23.875,9.2"/>
        <dia:point val="28.34,9.2"/>
        <dia:point val="28.34,11.83"/>
      </dia:attribute>
      <dia:attribute name="orth_orient">
        <dia:enum val="1"/>
        <dia:enum val="0"/>
        <dia:enum val="1"/>
      </dia:attribute>
      <dia:attribute name="orth_autoroute">
        <dia:boolean val="false"/>
      </dia:attribute>
      <dia:attribute name="text_colour">
        <dia:color val="#000000"/>
      </dia:attribute>
      <dia:attribute name="line_colour">
        <dia:color val="#000000"/>
      </dia:attribute>
      <dia:attribute name="name">
        <dia:string>##</dia:string>
      </dia:attribute>
      <dia:attribute name="stereotype">
        <dia:string>##</dia:string>
      </dia:attribute>
      <dia:connections>
        <dia:connection handle="0" to="O0" connection="6"/>
        <dia:connection handle="1" to="O7" connection="1"/>
      </dia:connections>
    </dia:object>
    <dia:object type="UML - Generalization" version="1" id="O10">
      <dia:attribute name="obj_pos">
        <dia:point val="23.875,6.4"/>
      </dia:attribute>
      <dia:attribute name="obj_bb">
        <dia:rectangle val="23.025,6.35;36.29,11.88"/>
      </dia:attribute>
      <dia:attribute name="meta">
        <dia:composite type="dict"/>
      </dia:attribute>
      <dia:attribute name="orth_points">
        <dia:point val="23.875,6.4"/>
        <dia:point val="23.875,9.2"/>
        <dia:point val="36.24,9.2"/>
        <dia:point val="36.24,11.83"/>
      </dia:attribute>
      <dia:attribute name="orth_orient">
        <dia:enum val="1"/>
        <dia:enum val="0"/>
        <dia:enum val="1"/>
      </dia:attribute>
      <dia:attribute name="orth_autoroute">
        <dia:boolean val="false"/>
      </dia:attribute>
      <dia:attribute name="text_colour">
        <dia:color val="#000000"/>
      </dia:attribute>
      <dia:attribute name="line_colour">
        <dia:color val="#000000"/>
      </dia:attribute>
      <dia:attribute name="name">
        <dia:string>##</dia:string>
      </dia:attribute>
      <dia:attribute name="stereotype">
        <dia:string>##</dia:string>
      </dia:attribute>
      <dia:connections>
        <dia:connection handle="0" to="O0" connection="6"/>
        <dia:connection handle="1" to="O6" connection="1"/>
      </dia:connections>
    </dia:object>
    <dia:object type="UML - Association" version="2" id="O11">
      <dia:attribute name="name">
        <dia:string>##</dia:string>
      </dia:attribute>
      <dia:attribute name="direction">
        <dia:enum val="0"/>
      </dia:attribute>
      <dia:attribute name="show_direction">
        <dia:boolean val="false"/>
      </dia:attribute>
      <dia:attribute name="assoc_type">
        <dia:enum val="0"/>
      </dia:attribute>
      <dia:attribute name="role_a">
        <dia:string>#root#</dia:string>
      </dia:attribute>
      <dia:attribute name="multipicity_a">
        <dia:string>##</dia:string>
      </dia:attribute>
      <dia:attribute name="visibility_a">
        <dia:enum val="0"/>
      </dia:attribute>
      <dia:attribute name="show_arrow_a">
        <dia:boolean val="false"/>
      </dia:attribute>
      <dia:attribute name="role_b">
        <dia:string>##</dia:string>
      </dia:attribute>
      <dia:attribute name="multipicity_b">
        <dia:string>##</dia:string>
      </dia:attribute>
      <dia:attribute name="visibility_b">
        <dia:enum val="0"/>
      </dia:attribute>
      <dia:attribute name="show_arrow_b">
        <dia:boolean val="true"/>
      </dia:attribute>
      <dia:attribute name="obj_pos">
        <dia:point val="13.38,15.73"/>
      </dia:attribute>
      <dia:attribute name="obj_bb">
        <dia:rectangle val="13.33,14.53;19.9819,23.3454"/>
      </dia:attribute>
      <dia:attribute name="meta">
        <dia:composite type="dict"/>
      </dia:attribute>
      <dia:attribute name="orth_points">
        <dia:point val="13.38,15.73"/>
        <dia:point val="15.3,15.73"/>
        <dia:point val="15.3,21.7454"/>
        <dia:point val="19.9319,21.7454"/>
      </dia:attribute>
      <dia:attribute name="orth_orient">
        <dia:enum val="0"/>
        <dia:enum val="1"/>
        <dia:enum val="0"/>
      </dia:attribute>
      <dia:attribute name="orth_autoroute">
        <dia:boolean val="false"/>
      </dia:attribute>
      <dia:attribute name="text_colour">
        <dia:color val="#000000"/>
      </dia:attribute>
      <dia:attribute name="line_colour">
        <dia:color val="#000000"/>
      </dia:attribute>
      <dia:connections>
        <dia:connection handle="0" to="O1" connection="13"/>
        <dia:connection handle="1" to="O5" connection="3"/>
      </dia:connections>
    </dia:object>
    <dia:object type="UML - Association" version="2" id="O12">
      <dia:attribute name="name">
        <dia:string>##</dia:string>
      </dia:attribute>
      <dia:attribute name="direction">
        <dia:enum val="0"/>
      </dia:attribute>
      <dia:attribute name="show_direction">
        <dia:boolean val="false"/>
      </dia:attribute>
      <dia:attribute name="assoc_type">
        <dia:enum val="0"/>
      </dia:attribute>
      <dia:attribute name="role_a">
        <dia:string>##</dia:string>
      </dia:attribute>
      <dia:attribute name="multipicity_a">
        <dia:string>##</dia:string>
      </dia:attribute>
      <dia:attribute name="visibility_a">
        <dia:enum val="0"/>
      </dia:attribute>
      <dia:attribute name="show_arrow_a">
        <dia:boolean val="false"/>
      </dia:attribute>
      <dia:attribute name="role_b">
        <dia:string>##</dia:string>
      </dia:attribute>
      <dia:attribute name="multipicity_b">
        <dia:string>##</dia:string>
      </dia:attribute>
      <dia:attribute name="visibility_b">
        <dia:enum val="0"/>
      </dia:attribute>
      <dia:attribute name="show_arrow_b">
        <dia:boolean val="true"/>
      </dia:attribute>
      <dia:attribute name="obj_pos">
        <dia:point val="17.3987,15.73"/>
      </dia:attribute>
      <dia:attribute name="obj_bb">
        <dia:rectangle val="16.3487,15.68;19.9819,22.6454"/>
      </dia:attribute>
      <dia:attribute name="meta">
        <dia:composite type="dict"/>
      </dia:attribute>
      <dia:attribute name="orth_points">
        <dia:point val="17.3987,15.73"/>
        <dia:point val="16.3987,15.73"/>
        <dia:point val="16.3987,21.0454"/>
        <dia:point val="19.9319,21.0454"/>
      </dia:attribute>
      <dia:attribute name="orth_orient">
        <dia:enum val="0"/>
        <dia:enum val="1"/>
        <dia:enum val="0"/>
      </dia:attribute>
      <dia:attribute name="orth_autoroute">
        <dia:boolean val="false"/>
      </dia:attribute>
      <dia:attribute name="text_colour">
        <dia:color val="#000000"/>
      </dia:attribute>
      <dia:attribute name="line_colour">
        <dia:color val="#000000"/>
      </dia:attribute>
      <dia:connections>
        <dia:connection handle="0" to="O4" connection="12"/>
        <dia:connection handle="1" to="O5" connection="0"/>
      </dia:connections>
    </dia:object>
    <dia:object type="UML - Association" version="2" id="O13">
      <dia:attribute name="name">
        <dia:string>##</dia:string>
      </dia:attribute>
      <dia:attribute name="direction">
        <dia:enum val="0"/>
      </dia:attribute>
      <dia:attribute name="show_direction">
        <dia:boolean val="false"/>
      </dia:attribute>
      <dia:attribute name="assoc_type">
        <dia:enum val="0"/>
      </dia:attribute>
      <dia:attribute name="role_a">
        <dia:string>##</dia:string>
      </dia:attribute>
      <dia:attribute name="multipicity_a">
        <dia:string>##</dia:string>
      </dia:attribute>
      <dia:attribute name="visibility_a">
        <dia:enum val="0"/>
      </dia:attribute>
      <dia:attribute name="show_arrow_a">
        <dia:boolean val="false"/>
      </dia:attribute>
      <dia:attribute name="role_b">
        <dia:string>##</dia:string>
      </dia:attribute>
      <dia:attribute name="multipicity_b">
        <dia:string>##</dia:string>
      </dia:attribute>
      <dia:attribute name="visibility_b">
        <dia:enum val="0"/>
      </dia:attribute>
      <dia:attribute name="show_arrow_b">
        <dia:boolean val="true"/>
      </dia:attribute>
      <dia:attribute name="obj_pos">
        <dia:point val="31.04,15.73"/>
      </dia:attribute>
      <dia:attribute name="obj_bb">
        <dia:rectangle val="26.0819,15.68;32.14,23.3454"/>
      </dia:attribute>
      <dia:attribute name="meta">
        <dia:composite type="dict"/>
      </dia:attribute>
      <dia:attribute name="orth_points">
        <dia:point val="31.04,15.73"/>
        <dia:point val="32.04,15.73"/>
        <dia:point val="32.04,21.7454"/>
        <dia:point val="26.1319,21.7454"/>
      </dia:attribute>
      <dia:attribute name="orth_orient">
        <dia:enum val="0"/>
        <dia:enum val="1"/>
        <dia:enum val="0"/>
      </dia:attribute>
      <dia:attribute name="orth_autoroute">
        <dia:boolean val="false"/>
      </dia:attribute>
      <dia:attribute name="text_colour">
        <dia:color val="#000000"/>
      </dia:attribute>
      <dia:attribute name="line_colour">
        <dia:color val="#000000"/>
      </dia:attribute>
      <dia:connections>
        <dia:connection handle="0" to="O7" connection="13"/>
        <dia:connection handle="1" to="O5" connection="4"/>
      </dia:connections>
    </dia:object>
    <dia:object type="UML - Note" version="0" id="O14">
      <dia:attribute name="obj_pos">
        <dia:point val="25.1,25.35"/>
      </dia:attribute>
      <dia:attribute name="obj_bb">
        <dia:rectangle val="25.05,25.3;35.29,27.1"/>
      </dia:attribute>
      <dia:attribute name="meta">
        <dia:composite type="dict"/>
      </dia:attribute>
      <dia:attribute name="elem_corner">
        <dia:point val="25.1,25.35"/>
      </dia:attribute>
      <dia:attribute name="elem_width">
        <dia:real val="10.140000000000001"/>
      </dia:attribute>
      <dia:attribute name="elem_height">
        <dia:real val="1.7000000000000002"/>
      </dia:attribute>
      <dia:attribute name="line_width">
        <dia:real val="0.10000000000000001"/>
      </dia:attribute>
      <dia:attribute name="line_colour">
        <dia:color val="#000000"/>
      </dia:attribute>
      <dia:attribute name="fill_colour">
        <dia:color val="#ffffff"/>
      </dia:attribute>
      <dia:attribute name="text">
        <dia:composite type="text">
          <dia:attribute name="string">
            <dia:string>#returns new NullIterator#</dia:string>
          </dia:attribute>
          <dia:attribute name="font">
            <dia:font family="courier new" style="0" name="Courier"/>
          </dia:attribute>
          <dia:attribute name="height">
            <dia:real val="0.80000000000000004"/>
          </dia:attribute>
          <dia:attribute name="pos">
            <dia:point val="25.45,26.535"/>
          </dia:attribute>
          <dia:attribute name="color">
            <dia:color val="#000000"/>
          </dia:attribute>
          <dia:attribute name="alignment">
            <dia:enum val="0"/>
          </dia:attribute>
        </dia:composite>
      </dia:attribute>
    </dia:object>
    <dia:object type="UML - Dependency" version="1" id="O15">
      <dia:attribute name="obj_pos">
        <dia:point val="26.1319,23.3454"/>
      </dia:attribute>
      <dia:attribute name="obj_bb">
        <dia:rectangle val="26.0819,22.5454;30.2,25.8"/>
      </dia:attribute>
      <dia:attribute name="meta">
        <dia:composite type="dict"/>
      </dia:attribute>
      <dia:attribute name="orth_points">
        <dia:point val="26.1319,23.3454"/>
        <dia:point val="29.75,23.3454"/>
        <dia:point val="29.75,25.35"/>
      </dia:attribute>
      <dia:attribute name="orth_orient">
        <dia:enum val="0"/>
        <dia:enum val="1"/>
      </dia:attribute>
      <dia:attribute name="orth_autoroute">
        <dia:boolean val="false"/>
      </dia:attribute>
      <dia:attribute name="text_colour">
        <dia:color val="#000000"/>
      </dia:attribute>
      <dia:attribute name="line_colour">
        <dia:color val="#000000"/>
      </dia:attribute>
      <dia:attribute name="name">
        <dia:string>##</dia:string>
      </dia:attribute>
      <dia:attribute name="stereotype">
        <dia:string>##</dia:string>
      </dia:attribute>
      <dia:attribute name="draw_arrow">
        <dia:boolean val="true"/>
      </dia:attribute>
      <dia:connections>
        <dia:connection handle="0" to="O5" connection="9"/>
        <dia:connection handle="1" to="O14" connection="1"/>
      </dia:connections>
    </dia:object>
    <dia:object type="UML - Note" version="0" id="O16">
      <dia:attribute name="obj_pos">
        <dia:point val="35.6773,21.25"/>
      </dia:attribute>
      <dia:attribute name="obj_bb">
        <dia:rectangle val="35.6273,21.2;41.2473,23"/>
      </dia:attribute>
      <dia:attribute name="meta">
        <dia:composite type="dict"/>
      </dia:attribute>
      <dia:attribute name="elem_corner">
        <dia:point val="35.6773,21.25"/>
      </dia:attribute>
      <dia:attribute name="elem_width">
        <dia:real val="5.5199999999999996"/>
      </dia:attribute>
      <dia:attribute name="elem_height">
        <dia:real val="1.7000000000000002"/>
      </dia:attribute>
      <dia:attribute name="line_width">
        <dia:real val="0.10000000000000001"/>
      </dia:attribute>
      <dia:attribute name="line_colour">
        <dia:color val="#000000"/>
      </dia:attribute>
      <dia:attribute name="fill_colour">
        <dia:color val="#ffffff"/>
      </dia:attribute>
      <dia:attribute name="text">
        <dia:composite type="text">
          <dia:attribute name="string">
            <dia:string>#returns TRUE#</dia:string>
          </dia:attribute>
          <dia:attribute name="font">
            <dia:font family="courier new" style="0" name="Courier"/>
          </dia:attribute>
          <dia:attribute name="height">
            <dia:real val="0.80000000000000004"/>
          </dia:attribute>
          <dia:attribute name="pos">
            <dia:point val="36.0273,22.435"/>
          </dia:attribute>
          <dia:attribute name="color">
            <dia:color val="#000000"/>
          </dia:attribute>
          <dia:attribute name="alignment">
            <dia:enum val="0"/>
          </dia:attribute>
        </dia:composite>
      </dia:attribute>
    </dia:object>
    <dia:object type="UML - Dependency" version="1" id="O17">
      <dia:attribute name="obj_pos">
        <dia:point val="38.94,15.73"/>
      </dia:attribute>
      <dia:attribute name="obj_bb">
        <dia:rectangle val="38.89,15.68;43.2952,22.55"/>
      </dia:attribute>
      <dia:attribute name="meta">
        <dia:composite type="dict"/>
      </dia:attribute>
      <dia:attribute name="orth_points">
        <dia:point val="38.94,15.73"/>
        <dia:point val="43.1952,15.73"/>
        <dia:point val="43.1952,22.1"/>
        <dia:point val="40.7773,22.1"/>
      </dia:attribute>
      <dia:attribute name="orth_orient">
        <dia:enum val="0"/>
        <dia:enum val="1"/>
        <dia:enum val="0"/>
      </dia:attribute>
      <dia:attribute name="orth_autoroute">
        <dia:boolean val="false"/>
      </dia:attribute>
      <dia:attribute name="text_colour">
        <dia:color val="#000000"/>
      </dia:attribute>
      <dia:attribute name="line_colour">
        <dia:color val="#000000"/>
      </dia:attribute>
      <dia:attribute name="name">
        <dia:string>##</dia:string>
      </dia:attribute>
      <dia:attribute name="stereotype">
        <dia:string>##</dia:string>
      </dia:attribute>
      <dia:attribute name="draw_arrow">
        <dia:boolean val="true"/>
      </dia:attribute>
      <dia:connections>
        <dia:connection handle="0" to="O6" connection="13"/>
        <dia:connection handle="1" to="O16" connection="4"/>
      </dia:connections>
    </dia:object>
  </dia:layer>
</dia:diagram>