public MixedFormatConnectorMetadata get(ConnectorTransactionHandle transactionHandle) {
    return transactions.get(transactionHandle).get();
  }
This is used to guarantee one transaction to one {@link MixedFormatConnectorMetadata}
amoro-format-mixed/amoro-mixed-trino/src/main/java/org/apache/amoro/trino/MixedFormatTransactionManager.java