src/vs/workbench/browser/parts/views/treeView.ts/AbstractTreeView/layout
class AbstractTreeView:	layout(height: number, width: number) {
		if (height && width && this.messageElement && this.treeContainer) {
			this._height = height;
			this._width = width;
			const treeHeight = height - DOM.getTotalHeight(this.messageElement);
			this.treeContainer.style.height = treeHeight + 'px';
			this.tree?.layout(treeHeight, width);
		}
	}