class BiWsdlMessage:   def __init__(self, aSrcElement, aWsdl):      self.__partNames = [];       self.__parts = {};            for lPartTag in aSrcElement.getElementsByTagNameNS(BiWsdl.WSDL_NS, "part"):         self.__partNames.append(lPartTag.getAttribute("name"))         self.__parts[lPartTag.getAttribute("name")] = BiWsdlMessagePart(self, lPartTag)   def getPartNames(self):      return self.__partNames    def getPart(self, aPartName):      return self.__parts[aPartName]