src/chart/baseGroupedStackTimeBarChart.js
function xBarPadding() {
		var domain = xBar.domain();
		var barSpacing = (domain.length > 1 
			? (xBar(domain[1]) - xBar(domain[0])) 
			: xBar.rangeBand());
		var barPadding = (barSpacing - xBar.rangeBand());
		return barPadding;
	}
function xBarPadding() {
		var domain = xBar.domain();
		var barSpacing = (domain.length > 1 
			? (xBar(domain[1]) - xBar(domain[0])) 
			: xBar.rangeBand());
		var barPadding = (barSpacing - xBar.rangeBand());
		return barPadding;
	}
function xBarPadding ( ) { var domain = xBar . domain ( ) ; var barSpacing = ( domain . length > 1 ? ( xBar ( domain [ 1 ] ) - xBar ( domain [ 0 ] ) ) : xBar . rangeBand ( ) ) ; var barPadding = ( barSpacing - xBar . rangeBand ( ) ) ; return barPadding ; }
Get the number of pixels used for padding between bars.

@returns {Number} the number of pixels padding between each bar
Get the number of pixels used for padding between bars .