columnar::TestUtils::ColumnReaderEventCount Node1 columnar::TestUtils ::ColumnReaderEventCount   + ColumnReaderEventCount() + connect() + clearColumns() + getEntry() + setData() + getPerfData() + collectColumnData() Node2 columnar::TestUtils ::ColumnReader   + ~ColumnReader() + connect() + connectColumnIndices() + clearColumns() + getEntry() + setData() + getPerfData() + collectColumnData() Node2->Node1 Node3 std::vector< columnar ::TestUtils::ColumnReader ::OutputColumnInfo >     Node3->Node2 +outputColumns Node4 columnar::TestUtils ::ColumnReader::OutputColumnInfo + isOffset + primary + enabled + columnIndex   Node4->Node3 +elements Node5 std::string     Node5->Node4 +name Node6 std::basic_string< Char >     Node6->Node5 Node7 std::array< ColumnarOffset Type, 2 > + elements   Node7->Node1 +data