function hashHas(hash, key) {
	  return nativeCreate ? hash[key] !== undefined : hasOwnProperty.call(hash, key);
	}
Checks if a hash value for `key` exists.

@private
@param {Object} hash The hash to query.
@param {string} key The key of the entry to check.
@returns {boolean} Returns `true` if an entry for `key` exists, else `false`.