@staticmethod<EOL><INDENT>def implements(*interfaces):<DEDENT>
import sys<EOL>frame = sys._getframe(<NUM_LIT:1>)<EOL>locals_ = frame.f_locals<EOL>msg = '<STR_LIT>'<EOL>assert locals_ is not frame.f_globals and '<STR_LIT>' in locals_, msg<EOL>locals_.setdefault('<STR_LIT>', []).extend(interfaces)<EOL>
Can be used in the class definition of `Component`
        subclasses to declare the extension points that are extended.