code: def _add_implied_commands(self):
          
          if len(self.get_added_columns()) and not self._creating():
              self._commands.insert(0, self._create_command("add"))
  
          if len(self.get_changed_columns()) and not self._creating():
              self._commands.insert(0, self._create_command("change"))
  
          return self._add_fluent_indexes()
docs: Add the commands that are implied by the blueprint.