message: Don't snapshot child branches
diff: @@ -321,6 +321,12 @@ export class Document {
  public async snapshot(): Promise<void> {
  const entries: ITreeEntry[] = [];
  + // TODO: support for branch snapshots. For now simply no-op when a branch snapshot is requested
  + if (this.document.parentBranch) {
  + debug(`Skipping snapshot due to being branch of ${this.document.parentBranch}`);
  + return;
  + }
  +
  // Transform ops in the window relative to the MSN - the window is all ops between the min sequence number
  // and the current sequence number
  assert.equal(
  