运行时弃用。
仅文档。
类型：运行时
¥Type: Runtime
spawn() 和类似函数返回的子进程对象的 _channel 属性不供公共使用。改用 ChildProcess.channel。
spawn()
_channel
ChildProcess.channel
¥The _channel property of child process objects returned by spawn() and similar functions is not intended for public use. Use ChildProcess.channel instead.