function doConvertPixel(methodName, finder, value) {
	        var ecModel = this._model;
	        var coordSysList = this._coordSysMgr.getCoordinateSystems();
	        var result;

	        finder = modelUtil.parseFinder(ecModel, finder);

	        for (var i = 0; i < coordSysList.length; i++) {
	            var coordSys = coordSysList[i];
	            if (coordSys[methodName]
	                && (result = coordSys[methodName](ecModel, finder, value)) != null
	            ) {
	                return result;
	            }
	        }

	        if (true) {
	            console.warn(
	                'No coordinate system that supports ' + methodName + ' found by the given finder.'
	            );
	        }
	    }
Convert from pixel coordinate system to logical coordinate system.
See CoordinateSystem#convertFromPixel.
@param {string|Object} finder
       If string, e.g., 'geo', means {geoIndex: 0}.
       If Object, could contain some of these properties below:
       {
           seriesIndex / seriesId / seriesName,
           geoIndex / geoId / geoName,
           bmapIndex / bmapId / bmapName,
           xAxisIndex / xAxisId / xAxisName,
           yAxisIndex / yAxisId / yAxisName
           gridIndex / gridId / gridName,
           ... (can be extended)
       }
@param {Array|number} value
@return {Array|number} result