src/vs/workbench/api/common/extHostWorkspace.ts/ExtHostWorkspaceImpl/_findFolder
class ExtHostWorkspaceImpl:	private static _findFolder(workspace: ExtHostWorkspaceImpl, folderUriToFind: URI, extHostFileSystemInfo: IExtHostFileSystemInfo): MutableWorkspaceFolder | undefined {
		for (let i = 0; i < workspace.folders.length; i++) {
			const folder = workspace.workspaceFolders[i];
			if (isFolderEqual(folder.uri, folderUriToFind, extHostFileSystemInfo)) {
				return folder;
			}
		}

		return undefined;
	}