code: def register_path(self, path, modified_time=None):
          
  
          if not foundations.common.path_exists(path):
              raise foundations.exceptions.PathExistsError("{0} | '{1}' path doesn't exists!".format(
                  self.__class__.__name__, path))
  
          if path in self:
              raise umbra.exceptions.PathRegistrationError("{0} | '{1}' path is already registered!".format(
                  self.__class__.__name__, path))
  
          self.__paths[path] = (self.get_path_modified_time(
              path) if modified_time is None else modified_time, os.path.isfile(path))
          return True
docs: Registers given path.
  
          :param path: Path name.
          :type path: unicode
          :param modified_time: Custom modified time.
          :type modified_time: int or float
          :return: Method success.
          :rtype: bool