RNTupleContainer::FieldDesc Node1 RNTupleContainer::FieldDesc + fieldname + view + sgkey + clazz + object + str + rows_written + auxdyn_reader + auxdyn_writer + FieldDesc() + FieldDesc() + FieldDesc() + ~FieldDesc() + operator=() + operator=() + typeName() Node2 pool::DbColumn - m_typeName - m_colName - m_offset - m_nElem - m_opts - m_size - m_type + DbColumn() + operator=() + DbColumn() + DbColumn() + ~DbColumn() + isValid() + name() + typeName() + options() + offset() + size() + nElement() + typeID() + toString() + fromString() + typeName() - DbColumn() Node2->Node1