Doubt in list Groovy GDK

I am new to Groovy world and the language is pretty interesting.

I am going many samples on groovy language,

I found that we can apply many closures to the list like collect , multiply , find, findAll and every and any. I have gone through http://groovy.codehaus.org/groovy-jdk/java/util/List.html api to verify what are other closures we can apply on list. Surprisingly I could not find any above mentioned closures on List api.

I am not getting how this closures are not mentioned in api when we are using closures on the list ?

Please clear this doubt,

DefaultGroovyMethods Documentation
You can find them here..

Thanks a lot Halley Thomas :-) .

I can see bunch of overloaded methods there. I am sure that with the help of default methods we can do groovy things :-).