The parent zone of the this zone.
Is null
if this
is the root zone.
Zones are created by fork on an existing zone, or by runZoned which forks the current zone. The new zone's parent zone is the zone it was forked from.
Zone get parent;
© 2012 the Dart project authors
Licensed under the Creative Commons Attribution-ShareAlike License v4.0.
https://api.dartlang.org/stable/2.0.0/dart-async/Zone/parent.html