add contact to address book concode_field_sep List<Contact> contacts concode_field_sep boolean exits concode_elem_sep ContactsIterator getIterator concode_elem_sep boolean removeContact concode_elem_sep boolean equals concode_elem_sep boolean updateContact concode_elem_sep Contact getContact concode_elem_sep List<Contact> getAllContacts
boolean function ( Contact arg0 ) { if ( ! exits ( arg0 ) ) { contacts . add ( arg0 ) ; return true ; } return false ; }