def getAddressBinding(self):
for item in self.extensions:<EOL><INDENT>if isinstance(item, SoapAddressBinding) orisinstance(item, HttpAddressBinding):<EOL><INDENT>return item<EOL><DEDENT><DEDENT>raise WSDLError(<EOL>'<STR_LIT>'<EOL>)<EOL>
A convenience method to obtain the extension element used
           as the address binding for the port.