Ò kotlin properties Delegates Any notNull ReadWriteProperty T observable initialValue onChange Function3 reflect KProperty ParameterName name property oldValue newValue Unit vetoable BooleanP              ¸ "àÆBJ "28J"2(2 (8H†J"2(2 ( 8H†ò‡ 0 0 H 0 0² ( H² ( H² ( 0 0 0  0