code: func (b *BloomIndexer) Reset(ctx context.Context, section uint64, lastSectionHead common.Hash) error {
  	gen, err := bloombits.NewGenerator(uint(b.size))
  	b.gen, b.section, b.head = gen, section, common.Hash{}
  	return err
  }
docs: // Reset implements core.ChainIndexerBackend, starting a new bloombits index
  // section.