code: def mutate_query_from_config(self, sql):
          
          SQL_QUERY_MUTATOR = config.get('SQL_QUERY_MUTATOR')
          if SQL_QUERY_MUTATOR:
              username = utils.get_username()
              sql = SQL_QUERY_MUTATOR(sql, username, security_manager, self.database)
          return sql
docs: Apply config's SQL_QUERY_MUTATOR
  
          Typically adds comments to the query with context