Single-use deferred handle returned by a successful start stage.
execute() runs the main stage and consumes the handle; a second call throws LifecycleError.
execute()
LifecycleError
Runs the main stage and returns a [JsExecuteResult].
JsExecuteResult
Throws LifecycleError when the request has already been executed or this request's owning engine is re-entered from one of its callbacks.
Single-use deferred handle returned by a successful start stage.
execute()runs the main stage and consumes the handle; a second call throwsLifecycleError.