Deprecation Guide for Meta Destruction APIs

We are deprecated usage of Ember.meta destruction apis.

• setSourceDestroying()
• setSourceDestroyed()
• isSourceDestroying()
• isSourceDestroyed()

Instead, you should use the similarly named APIs from @ember/destroyable.

RFC: https://emberjs.github.io/rfcs/0580-destroyables.html

import { destroy, isDestroying, isDestroyed } from '@ember/destroyable' ;

let component = EmberObject.create();

isDestroying(component); // => false
isDestroyed(component); // => false

destroy(component);

isDestroying(component); // => true
isDestroyed(component); // => false

// some time later
isDestroyed(component); // => true