src/vs/base/browser/ui/tree/compressedObjectTreeModel.ts/CompressedObjectTreeModel/setCollapsed
class CompressedObjectTreeModel:	setCollapsed(location: T | null, collapsed?: boolean | undefined, recursive?: boolean | undefined): boolean {
		const compressedNode = this.getCompressedNode(location);
		return this.model.setCollapsed(compressedNode, collapsed, recursive);
	}