#NEWLINE# def test_sets_recognizable_wrapper_attribute( self ) : #NEWLINE# #INDENT# @ decorators . annotate_arg ( 'foo' , 'an-annotation' ) #NEWLINE# def some_function( foo ) : #NEWLINE# #INDENT# return foo #NEWLINE# #UNINDENT# self . assertTrue ( hasattr ( some_function , decorators . _IS_WRAPPER_ATTR ) )