Add new default interface.

   */

  boolean isAvailable(@NonNull Context context);

  /**

   * Optional: Performs work necessary to happen-before callers use other methods on this interface.

   *

   * @apiNote Use of this API is completely optional, and callers are NOT required to invoke this

   *     method prior to using other methods on the interface.

   * @implSpec Other members of this interface always promise to do any required initialization work

   *     at the time they are invoked. This method will always be idempotent.

   */

  default void performManualInitialization() {}

  /** Returns the config provider flag associated with the feature. */

  @NonNull

  String getConfigProviderFlag();