always throws unsupportedoperationexception since this object is not attached to a map . concode_field_sep V value concode_elem_sep K key concode_field_sep K getKey concode_elem_sep V getValue concode_elem_sep int hashCode concode_elem_sep boolean equals concode_elem_sep String toString concode_elem_sep void setValueInternal
V function ( V arg0 ) { throw new UnsupportedOperationException ( ) ; }