docs: def load_stored_routine(self):
          """
          Loads the stored routine into the instance of MySQL.
  
          Returns the metadata of the stored routine if the stored routine is loaded successfully. Otherwise returns
          False.
  
          :rtype: dict[str,str]|bool
          """
          try:
              self._routine_name = os.path.splitext(os.path.basename(self._source_filename))[0]
  
              if os.path.exists(self._source_filename):
                  if os.path.isfile(self._source_filename):
                      self._m_time = int(os.path.getmtime(self._source_filename))
                  else:
                      raise LoaderException("Unable to get mtime of file '{}'".format(self._source_filename))
              else:
                  raise LoaderException("Source file '{}' does not exist".format(self._source_filename))
  
              if self._pystratum_old_metadata:
                  self._pystratum_metadata = self._pystratum_old_metadata
  
              load = self._must_reload()
              if load:
                  self.__read_source_file()
  
                  self.__get_placeholders()
  
                  self._get_designation_type()
  
                  self._get_name()
  
                  self.__substitute_replace_pairs()
  
                  self._load_routine_file()
  
                  if self._designation_type == 'bulk_insert':
                      self._get_bulk_insert_table_columns_info()
  
                  self._get_routine_parameters_info()
  
                  self.__get_doc_block_parts_wrapper()
  
                  self.__save_shadow_copy()
  
                  self._update_metadata()
  
              return self._pystratum_metadata
  
          except Exception as exception:
              self._log_exception(exception)
              return False