src/vs/workbench/contrib/files/common/explorerModel.ts/ExplorerModel/findClosest
class ExplorerModel:	findClosest(resource: URI): ExplorerItem | null {
		const folder = this.contextService.getWorkspaceFolder(resource);
		if (folder) {
			const root = this.roots.find(r => this.uriIdentityService.extUri.isEqual(r.resource, folder.uri));
			if (root) {
				return root.find(resource);
			}
		}

		return null;
	}