Function validateFormGroupControls

packages/forms/src/model/form_group.ts:678–688

* Will validate that none of the controls has a key with a dot * Throws other wise

(controls: {
  [K in keyof TControl]: AbstractControl<any, any>;
})

 * Throws other wise
 */
function validateFormGroupControls<TControl>(controls: {
  [K in keyof TControl]: AbstractControl<any, any>;
}) {
  const invalidKeys = Object.keys(controls).filter((key) => key.includes('.'));
  if (invalidKeys.length > 0) {
    // TODO: make this an error once there are no more uses in G3
    console.warn(
      `FormGroup keys cannot include \`.\`, please replace the keys for: ${invalidKeys.join(',')}.`,
    );
  }
}

interface UntypedFormGroupCtor {
  new (