text: //
  //  __  __          ____           _          _
  //  \ \/ / /\_/\   /___ \  _   _  (_)   ___  | | __
  //   \  /  \_ _/  //  / / | | | | | |  / __| | |/ /
  //   /  \   / \  / \_/ /  | |_| | | | | (__  |   <
  //  /_/\_\  \_/  \___,_\   \__,_| |_|  \___| |_|\_\
  //
  //  Copyright (C) Heaven.
  //
  //	https://github.com/uxyheaven/XYQuick
  //
  //	Permission is hereby granted, free of charge, to any person obtaining a copy
  //	of this software and associated documentation files (the "Software"), to deal
  //	in the Software without restriction, including without limitation the rights
  //	to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
  //	copies of the Software, and to permit persons to whom the Software is
  //	furnished to do so, subject to the following conditions:
  //
  //	The above copyright notice and this permission notice shall be included in
  //	all copies or substantial portions of the Software.
  //
  //	THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  //	IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  //	FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
  //	AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  //	LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
  //	OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
  //	THE SOFTWARE.
  //
  
  @protocol XYCacheProtocol
  
  - (BOOL)hasObjectForKey:(id)key;
  
  - (id)objectForKey:(id)key;
  - (void)setObject:(id)object forKey:(id)key;
  
  - (void)removeObjectForKey:(id)key;
  - (void)removeAllObjects;
  
  @end
  