src/vs/base/browser/ui/grid/grid.ts/Grid/removeView
class Grid:	removeView(view: T, sizing?: Sizing): void {
		if (this.views.size === 1) {
			throw new Error('Can\'t remove last view');
		}

		const location = this.getViewLocation(view);
		this.gridview.removeView(location, (sizing && sizing.type === 'distribute') ? GridViewSizing.Distribute : undefined);
		this.views.delete(view);
	}