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unpack 

        # Socket::Option.unpack

(from ruby core)
### Implementation from Option
---
    sockopt.unpack(template) => array

---

Calls String#unpack on sockopt.data.

    sockopt = Socket::Option.new(:INET, :SOCKET, :KEEPALIVE, [1].pack("i"))
    p sockopt.unpack("i")      #=> [1]
    p sockopt.data.unpack("i") #=> [1]

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