/guava/guava/src/com/google/common/collect/SortedMultisets.java
return getElementOrNull( multiset( ).pollFirstEntry( ) ) ;
return getElementOrNull ( multiset ( ) .pollLastEntry ( ) ) ;
public E pollFirst() { return getElementOrNull(multiset().pollFirstEntry()); } @Override @CheckForNull public E pollLast() { <extra_id_0> } @Override public NavigableSet<E> subSet( @ParametricNullness E fromElement, boolean fromInclusive, @ParametricNullness E toElement,