/guava/guava/src/com/google/common/collect/AbstractNavigableMap.java
return tailMap( toKey, false) ;
return headMap ( toKey, false ) ;
@Override public SortedMap<K, V> subMap(@ParametricNullness K fromKey, @ParametricNullness K toKey) { return subMap(fromKey, true, toKey, false); } @Override public SortedMap<K, V> headMap(@ParametricNullness K toKey) { <extra_id_0> } @Override public SortedMap<K, V> tailMap(@ParametricNullness K fromKey) { return tailMap(fromKey, true); } @Override