function has(obj, state, visualType) {
	                return obj && obj[state] && (
	                    zrUtil.isObject(obj[state])
	                        ? obj[state].hasOwnProperty(visualType)
	                        : obj[state] === visualType // e.g., inRange: 'symbol'
	                );
	            }
Key is this._mode
@type {Object}
@this {module:echarts/component/viusalMap/PiecewiseMode}