presto-iceberg/src/main/java/io/prestosql/plugin/iceberg/IcebergHandleResolver.java/IcebergHandleResolver/getInsertTableHandleClass
class IcebergHandleResolver:    @Override
    public Class<? extends ConnectorInsertTableHandle> getInsertTableHandleClass()
    {
        return IcebergWritableTableHandle.class;
    }