code: def isObservableElement(self, elementName):
          
          if not(isinstance(elementName, str)):
              raise TypeError(
                  "Element name should be a string ." +
                  "I receive this {0}"
                  .format(elementName))
  
          return (True if (elementName == "*")
                  else self._evaluateString(elementName))
docs: Mention if an element is an observable element.
  
          :param str ElementName: the element name to evaluate
          :return: true if is an observable element, otherwise false.
          :rtype: bool