}
          break;
        case 'state':
          switch (fiber.tag) {
            case ClassComponent:
              setInObject(instance.state, path, value);
              instance.forceUpdate();
              break;
          }
          break;
      }
    }
  }
  type CommitProfilingData = {|
    changeDescriptions: Map<number, ChangeDescription> | null,
    commitTime: number,
    durations: Array<number>,
    interactions: Array<Interaction>,
    maxActualDuration: number,
    priorityLevel: string | null,
  |};
  type CommitProfilingMetadataMap = Map<number, Array<CommitProfilingData>>;
  type DisplayNamesByRootID = Map<number, string>;
  let currentCommitProfilingMetadata: CommitProfilingData | null = null;
  let displayNamesByRootID: DisplayNamesByRootID | null = null;
  let idToContextsMap: Map<number, any> | null = null;
  let initialTreeBaseDurationsMap: Map<number, number> | null = null;
  let initialIDToRootMap: Map<number, number> | null = null;
  let isProfiling: boolean = false;
  let profilingStartTime: number = 0;