code: def get_matching_property_names(self, regex):
          
          log = logging.getLogger(self.cls_logger + '.get_matching_property_names')
          prop_list_matched = []
          if not isinstance(regex, basestring):
              log.warn('regex arg is not a string, found type: {t}'.format(t=regex.__class__.__name__))
              return prop_list_matched
          log.debug('Finding properties matching regex: {r}'.format(r=regex))
          for prop_name in self.properties.keys():
              match = re.search(regex, prop_name)
              if match:
                  prop_list_matched.append(prop_name)
          return prop_list_matched
docs: Returns a list of property names matching the provided
          regular expression
  
          :param regex: Regular expression to search on
          :return: (list) of property names matching the regex