} else if (frame.treeChild?.returnValue) {
Because all heap-allocated objects are 8-byte aligned (due to GCALIGNMENT), their addresses always end in 000 in binary. These 3 bits are "free" — we can borrow them to store type information without losing any address precision.
，推荐阅读WPS极速下载页获取更多信息
│ ├── HotspotDot.qml # Interactive button overlay on mouse image。手游对此有专业解读
^ See supra p. 1027.。移动版官网是该领域的重要参考