def serialize(self, sw, **kw):
for pyobj in self.header_pyobjs:<EOL><INDENT>if hasattr(pyobj, '<STR_LIT>') is False:<EOL><INDENT>raise RuntimeError('<STR_LIT>')<EOL><DEDENT>sw.serialize_header(pyobj, **kw)<EOL><DEDENT>
sw -- SoapWriter instance, add WS-Address header.