message: Add unreferenced property to ISnapshotTree in protocol definitions
diff: @@ -101,6 +101,8 @@ export interface ISnapshotTree {
  // TODO: Commits should be removed from here to ISnapshotTreeEx once ODSP snapshots move away from commits
  commits: { [path: string]: string };
  trees: { [path: string]: ISnapshotTree };
  + // Indicates that this tree is unreferenced. If this is not present, the tree is considered referenced.
  + unreferenced?: true;
  }
  export interface ISnapshotTreeEx extends ISnapshotTree {
  