def bodypart_types(self, method, input=True):
        """
        Get a list of I{parameter definitions} (pdef) defined for the specified
        method.
        Each I{pdef} is a tuple (I{name}, L{xsd.sxbase.SchemaObject})
        @param method: A service method.
        @type method: I{service.Method}
        @param input: Defines input/output message.
        @type input: boolean
        @return:  A list of parameter definitions
        @rtype: [I{pdef},]
        """
        result = []
        if input:
            parts = method.soap.input.body.parts
        else:
            parts = method.soap.output.body.parts
        for p in parts:
            if p.element is not None:
                query = ElementQuery(p.element)
            else:
                query = TypeQuery(p.type)
            pt = query.execute(self.schema())
            if pt is None:
                raise TypeNotFound(query.ref)
            if p.type is not None:
                pt = PartElement(p.name, pt)
            if input:
                if pt.name is None:
                    result.append((p.name, pt))
                else:
                    result.append((pt.name, pt))
            else:
                result.append(pt)
        return result
Get a list of I{parameter definitions} (pdef) defined for the specified
        method.
        Each I{pdef} is a tuple (I{name}, L{xsd.sxbase.SchemaObject})
        @param method: A service method.
        @type method: I{service.Method}
        @param input: Defines input/output message.
        @type input: boolean
        @return:  A list of parameter definitions
        @rtype: [I{pdef},]