code: func (m *mgr) GetRetriever(ledgerID string, ledgerInfoRetriever LedgerInfoRetriever) ledger.ConfigHistoryRetriever {
  	return &retriever{dbHandle: m.dbProvider.getDB(ledgerID), ledgerInfoRetriever: ledgerInfoRetriever}
  }
docs: // GetRetriever returns an implementation of `ledger.ConfigHistoryRetriever` for the given ledger id.