The orientation of the chart. When set to'vertical', rotates the axes of the chart so that (for instance) a column chart becomes a bar chart, and an area chart grows rightward instead of up:

this.barChart.setOrientation(Orientation.VERTICAL);

The options for isStacked are:

• false — elements will not stack. This is the default option.
• true — stacks elements for all series at each domain value.
• 'percent' — stacks elements for all series at each domain value and rescales them such that they add up to 100%, with each element's value calculated as a percentage of 100%.
• 'relative' — stacks elements for all series at each domain value and rescales them such that they add up to 1, with each element's value calculated as a fraction of 1.
• 'absolute' — functions the same as isStacked: true.

this.barChart.setStackMode(StackMode.TRUE);

Where to place the axis titles, compared to the chart area. Supported values:

barChart.setAxisTitlesPosition(AxisTitlesPosition.IN);

An object with members to configure various horizontal axis elements. To specify properties of this object, you can use object literal notation, as shown here:

Axis haxis= Axis.Builder()
	.slantedText(true)
	.direction(Direction.REVERSE)
	.minorGridlines(GridLines.New("red", 5))
	.format("currency").build();

barChart.setHAxis(haxis);

More detailed information about Axis see: https://developers.google.com/chart/interactive/docs/gallery/barchart#bar-styles