sort contacts by identifier . concode_field_sep Contact[] backend concode_elem_sep Storage instance concode_elem_sep String TEMPLATE_SORT concode_field_sep List<Contact> getSortedByPhone concode_elem_sep boolean saveContact concode_elem_sep String toNumeric concode_elem_sep boolean removeContact concode_elem_sep boolean removeContact concode_elem_sep List<Contact> getSortedByFirstName concode_elem_sep boolean checkIndex concode_elem_sep List<Contact> getSortedByLastName concode_elem_sep List<Contact> getSortedByEmail concode_elem_sep Storage getInstance concode_elem_sep List<Contact> getContacts concode_elem_sep Contact getContact concode_elem_sep String unicKey
List < Contact > function ( ) { return Arrays . asList ( backend ) ; }