Description:

This module provides keywords that behave (almost) identically to familiar
functions from the List::Util manpage, but implemented as keyword plugins
instead of functions. As a result these run more efficiently, especially in
small code cases.

Blocks vs Anonymous Subs
In the description above the word "almost" refers to the fact that as
this module provides true keywords, the code blocks to them can be
parsed as true blocks rather than anonymous functions. As a result,
both 'caller' and 'return' will behave rather differently here.

For example,