returning void from a method

Quickie

if I have a method thats is typed void e.g.

void myMethod(test)

how can i return from it using the return statement

e.g. 

void myMethod(test){
 if(test == null) return
 // otherwise do stuff
 .... stuff
}

how do i do this withou generating an error ? is it possible ? is
there a special void object or something ?
-- 
regards
babelex

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