[Twisted-web] ProcessMethodBinding

Hi, I made a change in the class ProcessMethodBinding but I do not want to change directly the code in processors.py. I want my class to be under another name ( MyProcessMethodBinding) in another file and to adapt it in nevow with compy.registerAdapter. My new class has to be to call up instead of ProcessMethodBinding. I've been searching for awhile and I didn't find out how to make. Thank you Vicky