function(time, index, ticks, format) {
		var me = this;
		var adapter = me._adapter;
		var options = me.options;
		var formats = options.time.displayFormats;
		var minorFormat = formats[me._unit];
		var majorUnit = me._majorUnit;
		var majorFormat = formats[majorUnit];
		var majorTime = +adapter.startOf(time, majorUnit);
		var majorTickOpts = options.ticks.major;
		var major = majorTickOpts.enabled && majorUnit && majorFormat && time === majorTime;
		var label = adapter.format(time, format ? format : major ? majorFormat : minorFormat);
		var tickOpts = major ? majorTickOpts : options.ticks.minor;
		var formatter = valueOrDefault$c(tickOpts.callback, tickOpts.userCallback);

		return formatter ? formatter(label, index, ticks) : label;
	}
function(time, index, ticks, format) {
		var me = this;
		var adapter = me._adapter;
		var options = me.options;
		var formats = options.time.displayFormats;
		var minorFormat = formats[me._unit];
		var majorUnit = me._majorUnit;
		var majorFormat = formats[majorUnit];
		var majorTime = +adapter.startOf(time, majorUnit);
		var majorTickOpts = options.ticks.major;
		var major = majorTickOpts.enabled && majorUnit && majorFormat && time === majorTime;
		var label = adapter.format(time, format ? format : major ? majorFormat : minorFormat);
		var tickOpts = major ? majorTickOpts : options.ticks.minor;
		var formatter = valueOrDefault$c(tickOpts.callback, tickOpts.userCallback);

		return formatter ? formatter(label, index, ticks) : label;
	}
function ( time , index , ticks , format ) { var me = this ; var adapter = me . _adapter ; var options = me . options ; var formats = options . time . displayFormats ; var minorFormat = formats [ me . _unit ] ; var majorUnit = me . _majorUnit ; var majorFormat = formats [ majorUnit ] ; var majorTime = + adapter . startOf ( time , majorUnit ) ; var majorTickOpts = options . ticks . major ; var major = majorTickOpts . enabled && majorUnit && majorFormat && time === majorTime ; var label = adapter . format ( time , format ? format : major ? majorFormat : minorFormat ) ; var tickOpts = major ? majorTickOpts : options . ticks . minor ; var formatter = valueOrDefault$c ( tickOpts . callback , tickOpts . userCallback ) ; return formatter ? formatter ( label , index , ticks ) : label ; }
Function to format an individual tick mark
@private
Function to format an individual tick mark
Returns a string that can be used to format the ticks.