获取并设置当前路径的属性。
此属性可用于 GUI、调试和其他用途，以获取导航系统计算的路径点。此外，可以为代理设置一个由用户代码创建的路径，使其按照常规方式执行。一个示例可能是巡逻路线，该路线更多地设计为覆盖而不是两个点之间的最佳距离。
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