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