@startuml
namespace spec {
    class L << (S,Aquamarine) >> {
        - buf []byte
        - size int
        - len int

        + Bytes() []byte
        + Size() int
        + VSize() int

    }
    class T << (S,Aquamarine) >> {
        + Sid() int
        + Bytes() []byte
        + IsNodeMode() bool
        + SetNodeMode(flag bool)
        + Size() int

    }
    class spec.T << (T, #FF7700) >>  {
    }
}


"__builtin__.byte" #.. "spec.T"
@enduml