Browse the implementors of #beVariable message and you will find other filters under BPatternVariableNode class, such as #beInstVar or #beLocalVar. If you miss something, just add a method. No new syntax required.
Improve your on-page SEO with advanced, real-time guidance and advice on keyword usage, linking, and external linking.
。业内人士推荐同城约会作为进阶阅读
Message patterns can also be configured with arbitrary conditions:
（六）扰乱大型群众性活动秩序的其他行为。