columnar::TestUtils::ColumnDataOutputMet Node1 columnar::TestUtils ::ColumnDataOutputMet + termNames + offsetColumns + offsets + namesOffsets + namesData + namesHash + ColumnDataOutputMet() + connect() + clearColumns() + getEntry() + setData() Node2 columnar::TestUtils ::IColumnData + outputColumns + ~IColumnData() + connect() + clearColumns() + getEntry() + setData() Node2->Node1