// 步骤2：按位置降序排序（核心！保证从最前面的车开始分析，符合"不超车"规则）
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.
。91视频对此有专业解读
peripheral to provide some input for a job and then wait to be sent the results.
“We will continue to investigate,” she added.