@ts-ignore private API usage from Ember

addon/addon-test-support/@ember/test-helpers/-internal/build-registry.ts

@@ -95,22 +95,29 @@ export default function buildRegistry(resolver: Resolver) {
     },
   };
 
+  // @ts-ignore: this is private API.
   let fallbackRegistry = Application.buildRegistry(namespace);
   // TODO: only do this on Ember < 3.13
+  // @ts-ignore: this is private API.
   fallbackRegistry.register('component-lookup:main', Ember.ComponentLookup);
 
+  // @ts-ignore: this is private API.
   let registry = new Ember.Registry({
     fallback: fallbackRegistry,
   });
 
+  // @ts-ignore: this is private API.
   ApplicationInstance.setupRegistry(registry);
 
   // these properties are set on the fallback registry by `buildRegistry`
   // and on the primary registry within the ApplicationInstance constructor
   // but we need to manually recreate them since ApplicationInstance's are not
   // exposed externally
+  // @ts-ignore: this is private API.
   registry.normalizeFullName = fallbackRegistry.normalizeFullName;
+  // @ts-ignore: this is private API.
   registry.makeToString = fallbackRegistry.makeToString;
+  // @ts-ignore: this is private API.
   registry.describe = fallbackRegistry.describe;
 
   let owner = Owner.create({
@@ -129,7 +136,9 @@ export default function buildRegistry(resolver: Resolver) {
     __container__: null,
   }) as unknown as Owner;
 
+  // @ts-ignore: this is private API.
   let container = registry.container({ owner: owner });
+  // @ts-ignore: this is private API.
   owner.__container__ = container;
 
   exposeRegistryMethodsWithoutDeprecations(container);

addon/package.json

@@ -83,7 +83,7 @@
     "ember-load-initializers": "^2.1.2",
     "ember-maybe-import-regenerator-for-testing": "^1.0.0",
     "ember-resolver": "^9.0.1",
-    "ember-source": "~5.1.0-beta.1",
+    "ember-source": "~4.12",
     "ember-source-channel-url": "^3.0.0",
     "ember-try": "^2.0.0",
     "eslint": "^7.32.0",