src/vs/platform/workspace/common/workspace.ts/Workspace/updateFoldersMap
class Workspace:	private updateFoldersMap(): void {
		this._foldersMap = TernarySearchTree.forUris<WorkspaceFolder>(this._ignorePathCasing, () => true);
		for (const folder of this.folders) {
			this._foldersMap.set(folder.uri, folder);
		}
	}