/**
 * AxisPointer Interface:
 *
 *
 * Instance members:
 *
 *  + render {Function}: mandatory.
 *      If `show` called, axisPointer must be displayed or remain its original status.
 *      @param {module:echarts/model/Model} axisModel
 *      @param {module:echarts/model/Model} axisPointerModel
 *      @param {module:echarts/coord/ICoordinateSystem} coordSys
 *      @param {module:echarts/ExtensionAPI} api
 *      @param {boolean} forceRender
 *
 *  + remove {Function}: mandatory.
 *      If `hide` called, axisPointer must be hidden.
 *      @param {module:echarts/ExtensionAPI} api
 *
 *  + dispose {Function}: mandatory
 *      @param {module:echarts/ExtensionAPI} api
 */