question: returns the head buffer segment or null if the list is empty . concode_field_sep Object[] head concode_elem_sep int size concode_elem_sep Object[] tail concode_elem_sep int indexInTail concode_elem_sep int capacityHint concode_field_sep void add concode_elem_sep int size concode_elem_sep Object[] tail concode_elem_sep int indexInTail concode_elem_sep String toString concode_elem_sep int capacityHint concode_elem_sep List<Object> toList
target: Object [ ] function ( ) { return head ; }