close abstract method
Future<ServerSocket> close(Closes the socket. The returned future completes when the socket is fully closed and is no longer bound.
Source
Future<ServerSocket> close();
© 2012 the Dart project authors
Licensed under the Creative Commons Attribution-ShareAlike License v4.0.
https://api.dartlang.org/stable/1.24.3/dart-io/ServerSocket/close.html