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