activeListeners

The registered listeners that are in an active state and are thus ready to handle callbacks.

A listener that becomes inactive while iterating over the sequence will not appear.

A listener that becomes active while iterating over the sequence, will appear only if it has not been skipped yet.

A listener that has been removed with removeListener or removeListeners while iterating over the sequence, will appear only if it is still active.

A listener that has been added with addListener or addListenerForever while iterating over the sequence, will not appear.