/guava/guava/src/com/google/common/collect/MoreCollectors.java
if ( ( extras.size( ) ) > ( MAX_EXTRAS) ) {   extras.subList( MAX_EXTRAS, extras.size( ) ).clear( ) ;   throw multiples( true) ; }
[Delete]
checkNotNull(o); if (element == null) { this.element = o; } else if (extras.isEmpty()) { extras = new ArrayList<>(MAX_EXTRAS); extras.add(o); <extra_id_0> extras.add(o); } else { throw multiples(true); } } ToOptionalState combine(ToOptionalState other) {