var getMapData = require('./_getMapData');

/**

* Checks if a map value for `key` exists.
*
* @private
* @name has
* @memberOf MapCache
* @param {string} key The key of the entry to check.
* @returns {boolean} Returns `true` if an entry for `key` exists, else `false`.
*/

function mapCacheHas(key) {

return getMapData(this, key).has(key);

}

module.exports = mapCacheHas;