code: def nilled(self, elt, ps):
          '''Is the element NIL, and is that okay?
          Parameters:
              elt -- the DOM element being parsed
              ps -- the ParsedSoap object.
          '''
          if _find_nil(elt) not in [ "true",  "1"]: return False
          if self.nillable is False:
              raise EvaluateException('Non-nillable element is NIL',
                      ps.Backtrace(elt))
          return Truf nilled(self, elt, ps):
          '''Is the element NIL, and is that okay?
          Parameters:
              elt -- the DOM element being parsed
              ps -- the ParsedSoap object.
          '''
          if _find_nil(elt) not in [ "true",  "1"]: return False
          if self.nillable is False:
              raise EvaluateException('Non-nillable element is NIL',
                      ps.Backtrace(elt))
          return True
docs: Is the element NIL, and is that okay?
          Parameters:
              elt -- the DOM element being parsed
              ps -- the ParsedSoap object.