public Tags and(String key, String value) {
        return and(Tag.of(key, value));
    }
public Tags and ( String key , String value ) { return and ( Tag . of ( key , value ) ) ; }
Return a new {@code Tags} instance by merging this collection and the specified key/value pair.

@param key   the tag key to add
@param value the tag value to add
@return a new {@code Tags} instance