message: Add assert
diff: @@ -51,8 +51,7 @@ export class EpochTracker {
  public async validateEpochFromPush(details: IConnected) {
  const epoch = details.epoch;
  - // [Todo: Issue https://github.com/microsoft/FluidFramework/issues/4989]
  - // assert(epoch !== undefined, "Connection details should contain epoch");
  + assert(epoch !== undefined, "Connection details should contain epoch");
  try {
  this.validateEpochFromResponse(epoch, "push");
  } catch (error) {
  