function isSilent(axisModel) {
	        var tooltipOpt = axisModel.get('tooltip');
	        return axisModel.get('silent')
	            // Consider mouse cursor, add these restrictions.
	            || !(
	                axisModel.get('triggerEvent') || (tooltipOpt && tooltipOpt.show)
	            );
	    }
key: makeKey(coordSys.model)
value: Object: key makeKey(axis.model), value: axisInfo