/guava/android/guava/src/com/google/common/collect/RegularImmutableTable.java
ImmutableList<Cell<R, C, V>> cellList = ImmutableList.copyOf ( cells ) ;
private static <R, C, V> RegularImmutableTable<R, C, V> forCellsInternal( Iterable<Cell<R, C, V>> cells, @CheckForNull Comparator<? super R> rowComparator, @CheckForNull Comparator<? super C> columnComparator) { Set<R> rowSpaceBuilder = new LinkedHashSet<>(); Set<C> columnSpaceBuilder = new LinkedHashSet<>(); <extra_id_0> for (Cell<R, C, V> cell : cells) { rowSpaceBuilder.add(cell.getRowKey()); columnSpaceBuilder.add(cell.getColumnKey()); } ImmutableSet<R> rowSpace = (rowComparator == null)