ngxs-ensure-store-metadata.ts

function ensureStoreMetadata(target) {
  if (!target.hasOwnProperty(META_KEY)) {
    const defaultMetadata = {
      name: null,
      actions: {},
      defaults: {},
      path: null,
      selectFromAppState: null,
      children: [],
      instance: null
    };
    Object.defineProperty(target, META_KEY, { value: defaultMetadata });
  }
  return getStoreMetadata(target);
}