How to use the @embroider/core.optionsWithDefaults function in @embroider/core

// your app and addons that it can't figure out on its own. These are combined
  // with the default rules that ship with Embroider. Your own rules take
  // precedence over the built-ins. Order matters, first matching rule will
  // apply to any given addon.
  //
  // See the addon-dependency-rules directory in the @embroider/compat package
  // for the built-in rules.
  //
  // These ONLY APPLY to v1-formatted addons. An addon that ships as native v2
  // is expected to do the right thing on its own.
  //
  // Follow to the definition of PackageRules for more info.
  packageRules?: PackageRules[];
}

const defaults = Object.assign(coreWithDefaults(), {
  staticAddonTrees: false,
  staticAddonTestSupportTrees: false,
  compatAdapters: new Map(),
  extraPublicTrees: [],
  workspaceDir: null,
  optionalComponents: [],
});

export function optionsWithDefaults(options?: Options): Required {
  return Object.assign({}, defaults, options);
}