docs: def clean(self):
          """*clean up and run some maintance tasks on the crossmatch catalogue helper tables*
  
          .. todo ::
  
              - update key arguments values and definitions with defaults
              - update return values and definitions
              - update usage examples and text
              - update docstring text
              - check sublime snippet exists
              - clip any useful text to docs mindmap
              - regenerate the docs and check redendering of this docstring
          """
          self.log.debug('starting the ``get`` method')
  
          self._update_tcs_helper_catalogue_tables_info_with_new_tables()
          self._updated_row_counts_in_tcs_helper_catalogue_tables_info()
          self._clean_up_columns()
          self._update_tcs_helper_catalogue_views_info_with_new_views()
          self._clean_up_columns()
          self._updated_row_counts_in_tcs_helper_catalogue_tables_info()
  
          print "`tcs_helper_catalogue_tables_info` & `tcs_helper_catalogue_views_info` database tables updated"
  
          self.log.debug('completed the ``get`` method')
          return None