refactor(core): add getSelf

packages/container/libraries/core/src/common/calculations/getSelf.spec.ts

@@ -0,0 +1,23 @@
+import { beforeAll, describe, expect, it } from '@jest/globals';
+
+import { getSelf } from './getSelf';
+
+describe(getSelf.name, () => {
+  let value: unknown;
+
+  beforeAll(() => {
+    value = Symbol();
+  });
+
+  describe('when called', () => {
+    let result: unknown;
+
+    beforeAll(() => {
+      result = getSelf(value);
+    });
+
+    it('should return expected value', () => {
+      expect(result).toBe(value);
+    });
+  });
+});

packages/container/libraries/core/src/common/calculations/getSelf.ts

@@ -0,0 +1,3 @@
+export function getSelf<T>(self: T): T {
+  return self;
+}