code: func NewBloomIndexer(db ethdb.Database, size, confirms uint64) *core.ChainIndexer {
  	backend := &BloomIndexer{
  		db:   db,
  		size: size,
  	}
  	table := rawdb.NewTable(db, string(rawdb.BloomBitsIndexPrefix))
  
  	return core.NewChainIndexer(db, table, backend, size, confirms, bloomThrottling, "bloombits")
  }
docs: // NewBloomIndexer returns a chain indexer that generates bloom bits data for the
  // canonical chain for fast logs filtering.