const {type, tag} = fiber;
    let resolvedType = type;
    if (typeof type === 'object' && type !== null) {
      resolvedType = resolveFiberType(type);
    }
    let resolvedContext: any = null;
    switch (tag) {
      case CacheComponent:
        return 'Cache';
      case ClassComponent:
      case IncompleteClassComponent:
        return getDisplayName(resolvedType);
      case FunctionComponent:
      case IndeterminateComponent:
        return getDisplayName(resolvedType);
      case ForwardRef:
        
        return (
          (type && type.displayName) ||
          getDisplayName(resolvedType, 'Anonymous')