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โฉ โฉ protocol
ๆณจๆ๏ผ็กๆณ็จ ่ฎๅ งๅปบ็ๅๅฎๅป้ตๅพชๅฆไธๅๅ งๅปบ็ๅๅฎโ
่ฉณๆ ่ซๅ้ฑ๏ผ can't change builtin hierarchy
Frame
Repeatable
protocol inheritance โฉ can't change builtin hierarchy