plugins/groovy/testdata/groovy/refactoring/extractMethod/argsUsedOnlyInClosure.test

def foo(b, c) {
  <begin>[].each {
    b.plus(c)
  }<end>
}
-----
def foo(b, c) {
    testMethod(b, c)
}

private ArrayList testMethod(b, c) {
    return [].each {
        b.plus(c)
    }
}