Java tutorial
/* * Copyright (c) Facebook, Inc. and its affiliates. * * This source code is licensed under the MIT license found in the * LICENSE file in the root directory of this source tree. */ package com.facebook.react.bridge; import com.facebook.proguard.annotations.DoNotStrip; /** Interface of a iterator for a {@link NativeMap}'s key set. */ @DoNotStrip public interface ReadableMapKeySetIterator { boolean hasNextKey(); String nextKey(); }