This question has been discussed by someone already: How can I elegantly call a Perl subroutine whose name is held in a variable?. But it doesn't answer the question completely. Actually I have the following code. It works but looks a bit ugly: 
if ( defined &{ "some::cool::${module}::method" } ) {
    &{ \&{ "some::cool::${module}::method" } }(some arguments);
} else {
    ...
}

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I can check the method availability as below but don't know how to proceed further in term of my question: 
if ( "some::cool::${module}"->can("method") ) {
    ???

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In reply to Elegant way to call a method by siberia-man

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