keep lib/engine-parent for legacy bundle

Author: ef4

packages/@ember/engine/lib/engine-parent.ts

@@ -0,0 +1,32 @@
+/**
+@module @ember/engine
+*/
+import type EngineInstance from './instance';
+
+export const ENGINE_PARENT = Symbol('ENGINE_PARENT');
+
+/**
+  `getEngineParent` retrieves an engine instance's parent instance.
+
+  @method getEngineParent
+  @param {EngineInstance} engine An engine instance.
+  @return {EngineInstance} The parent engine instance.
+  @for @ember/engine
+  @static
+  @private
+*/
+export function getEngineParent(engine: EngineInstance): EngineInstance | undefined {
+  return engine[ENGINE_PARENT];
+}
+
+/**
+  `setEngineParent` sets an engine instance's parent instance.
+
+  @method setEngineParent
+  @param {EngineInstance} engine An engine instance.
+  @param {EngineInstance} parent The parent engine instance.
+  @private
+*/
+export function setEngineParent(engine: EngineInstance, parent: EngineInstance): void {
+  engine[ENGINE_PARENT] = parent;
+}

packages/@ember/engine/parent.ts

@@ -1,32 +1 @@
-/**
-@module @ember/engine
-*/
-import type EngineInstance from './instance';
-
-export const ENGINE_PARENT = Symbol('ENGINE_PARENT');
-
-/**
-  `getEngineParent` retrieves an engine instance's parent instance.
-
-  @method getEngineParent
-  @param {EngineInstance} engine An engine instance.
-  @return {EngineInstance} The parent engine instance.
-  @for @ember/engine
-  @static
-  @private
-*/
-export function getEngineParent(engine: EngineInstance): EngineInstance | undefined {
-  return engine[ENGINE_PARENT];
-}
-
-/**
-  `setEngineParent` sets an engine instance's parent instance.
-
-  @method setEngineParent
-  @param {EngineInstance} engine An engine instance.
-  @param {EngineInstance} parent The parent engine instance.
-  @private
-*/
-export function setEngineParent(engine: EngineInstance, parent: EngineInstance): void {
-  engine[ENGINE_PARENT] = parent;
-}
+export * from './lib/engine-parent';