Groovy: add a method to a closure -

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i have following closure

def closure = {    println ("closure code") }

and add method it. if try

 closure.metaclass.fun = { c->         c.call();         println ("extra code");  }

i exception 

groovy.lang.missingpropertyexception: no such property: fun class: org.codehaus.groovy.runtime.metaclass.closuremetaclass

reading answer, blindly tried call

expandometaclass.enableglobally()

but it's not working.

is there way achive want?

you can do:

def closure = {     println "closure code" }  closure.getmetaclass().fun = { ->     delegate.call()     println "extra code" }     closure.fun()

which prints:

closure code code

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