# Method Concurrent.use_backend()

Method use_backend

  ``final` `void` use_backend(`int` `enable`)`

Parameter `enable`

  Setting this to `false` causes all Concurrent callbacks (except for timeouts) to be called directly, without using a backend.

Note

  As long as the backend hasn't started, it will default to `false`. Upon startup of the backend, it will change to `true` unless you explicitly called use_backend() before that.

Note

  (Un)setting this typically alters the order in which some callbacks are called (depending on what happens in a callback).