code: def _parse_query(self, source):
          
          if self.OBJECTFILTER_WORDS.search(source):
              syntax_ = "objectfilter"
          else:
              syntax_ = None  # Default it is.
  
          return query.Query(source, syntax=syntax_)
docs: Parse one of the rules as either objectfilter or dottysql.
  
          Example:
              _parse_query("5 + 5")
              # Returns Sum(Literal(5), Literal(5))
  
          Arguments:
              source: A rule in either objectfilter or dottysql syntax.
  
          Returns:
              The AST to represent the rule.