Gets the data for `map`.

@private
@param {Object} map The map to query.
@param {string} key The reference key.
@returns {*} Returns the map data.
function getMapData$3(map, key) {
	  var data = map.__data__;
	  return _isKeyable(key)
	    ? data[typeof key == 'string' ? 'string' : 'hash']
	    : data.map;
	}