code: def element_exists(self, element):
          
  
          if not self.__elements:
              return False
  
          for item in foundations.walkers.dictionaries_walker(self.__elements):
              path, key, value = item
              if key == element:
                  LOGGER.debug("> '{0}' attribute exists.".format(element))
                  return True
  
          LOGGER.debug("> '{0}' element doesn't exists.".format(element))
          return False
docs: Checks if given element exists.
  
          Usage::
  
              >>> plist_file_parser = PlistFileParser("standard.plist")
              >>> plist_file_parser.parse()
              True
              >>> plist_file_parser.element_exists("String A")
              True
              >>> plist_file_parser.element_exists("String Nemo")
              False
  
          :param element: Element to check existence.
          :type element: unicode
          :return: Element existence.
          :rtype: bool