src/vs/workbench/browser/parts/views/viewPaneContainer.ts/ViewPaneDropOverlay/doPositionOverlay
class ViewPaneDropOverlay:	private doPositionOverlay(options: { top?: string; bottom?: string; left?: string; right?: string; width: string; height: string }): void {

		// Container
		this.container.style.height = '100%';

		// Overlay
		this.overlay.style.top = options.top || '';
		this.overlay.style.left = options.left || '';
		this.overlay.style.bottom = options.bottom || '';
		this.overlay.style.right = options.right || '';
		this.overlay.style.width = options.width;
		this.overlay.style.height = options.height;
	}