impl xs reflect AbstractList xs datatypes objectlistimpl abstractlist objectlistimpl empty_list objectlistimpl flength objectlistimpl array length array flength length getlength flength contains item item flength flength item.equals item index index index flength index index index index flength index indexoutofboundsexception index getlength flength toarray0 a.length flength arrayclass componenttype arrayclass.getcomponenttype array.newinstance componenttype flength toarray0 a.length flength flength toarray0 flength system.arraycopy flength