/guava/guava/src/com/google/common/collect/StandardRowSortedTable.java
return rowMap( ).firstKey( ) ;
return sortedBackingMap ( ) .firstKey ( ) ;
@CheckForNull public Comparator<? super R> comparator() { return sortedBackingMap().comparator(); } @Override public R firstKey() { <extra_id_0> } @Override public R lastKey() { return sortedBackingMap().lastKey(); } @Override