如何获取指向通过golang中的interface {}传递的结构的指针？

No, I don't think this is a duplicate of How to determine an interface{} value's "real" type?. I know how to get the Type of an interface variable, but I can't find a way to get the pointer to an interface{}'s real type.

interface{}interface{}Tt

Ttinterface{}

reflect.TypeOf(v)Areflect.TypeOf(&v)*interface {}*A

*A

package main

import (
    "fmt"
    "reflect"
)

type SomeStruct1 struct{
}

type SomeStruct2 struct{
}

type SomeStruct3 struct{
}
etc...

func (*SomeStruct1) SomeMethod(){
    fmt.Println("hello")
}
func (*SomeStruct2) SomeMethod(){
    fmt.Println("hello")
}
func (*SomeStruct3) SomeMethod(){
    fmt.Println("hello")
}
etc...

func DoSomething(arg interface{}){
    switch v:=b.(type){
        []byte:{
            dosomething for []byte
        }
        default:{
            var m reflect.Value
            if value.Kind() != reflect.Ptr {
                m = reflect.ValueOf(&v).MethodByName("SomeMethod")
            } else {
                m = reflect.ValueOf(v).MethodByName("SomeMethod")
            }
            m.Call(nil)
        }
}

func main() {
    DoSomething([]byte{...})
    DoSomething(SomeStruct1{})
    DoSomething(&SomeStruct1{})
    etc..
}