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<h2 title="Interface Callback" class="title">Interface Callback<P,R></h2>
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<dt><span class="paramLabel">Type Parameters:</span></dt>
<dd><code>P</code> - The type of the argument provided to the <code>call</code> method.</dd>
<dd><code>R</code> - The type of the return type of the <code>call</code> method.</dd>
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<dd><a href="../../javafx/scene/control/cell/MapValueFactory.html" title="class in javafx.scene.control.cell">MapValueFactory</a>, <a href="../../javafx/scene/control/cell/PropertyValueFactory.html" title="class in javafx.scene.control.cell">PropertyValueFactory</a>, <a href="../../javafx/scene/control/cell/TreeItemPropertyValueFactory.html" title="class in javafx.scene.control.cell">TreeItemPropertyValueFactory</a></dd>
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<pre><a href="https://docs.oracle.com/javase/8/docs/api/java/lang/FunctionalInterface.html?is-external=true" title="class or interface in java.lang">@FunctionalInterface</a>
public interface <span class="typeNameLabel">Callback<P,R></span></pre>
<div class="block">The Callback interface is designed to allow for a common, reusable interface
to exist for defining APIs that requires a call back in certain situations.
<p>
Callback is defined with two generic parameters: the first parameter
specifies the type of the object passed in to the <code>call</code> method,
with the second parameter specifying the return type of the method.</div>
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<td class="colFirst"><code><a href="../../javafx/util/Callback.html" title="type parameter in Callback">R</a></code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../javafx/util/Callback.html#call-P-">call</a></span>(<a href="../../javafx/util/Callback.html" title="type parameter in Callback">P</a> param)</code>
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<h4>call</h4>
<pre><a href="../../javafx/util/Callback.html" title="type parameter in Callback">R</a> call(<a href="../../javafx/util/Callback.html" title="type parameter in Callback">P</a> param)</pre>
<div class="block">The <code>call</code> method is called when required, and is given a
single argument of type P, with a requirement that an object of type R
is returned.</div>
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<dd><code>param</code> - The single argument upon which the returned value should be
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