/guava/android/guava/src/com/google/common/collect/TreeBasedTable.java
updateBackingRowMapField( ) ;updateWholeRowField( ) ;
updateWholeRowField ( ) ;
return map; } return null; } @Override void maintainEmptyInvariant() { <extra_id_0> if (wholeRow != null && wholeRow.isEmpty()) { backingMap.remove(rowKey); wholeRow = null; backingRowMap = null; } }