src/vs/workbench/contrib/terminal/browser/terminalGroup.ts/SplitPaneContainer/layout
class SplitPaneContainer:	layout(width: number, height: number): void {
		this._width = width;
		this._height = height;
		if (this.orientation === Orientation.HORIZONTAL) {
			this._children.forEach(c => c.orthogonalLayout(height));
			this._splitView.layout(width);
		} else {
			this._children.forEach(c => c.orthogonalLayout(width));
			this._splitView.layout(height);
		}
	}