type TableOne struct {
    Id   int
    name string
    date string
}

type TableTwo struct {
    Id      int
    address string
    athome  bool
}

func SaveMyTables(tablename string, obj *struct{ Id int }) {
    // ... Some code here

    if obj.Id != 0 {
        // ... Some code here
    }

    // ... Some code here
}

obj := &TableTwo{
    Id: 5
    address: "some address"
    athome: false
}

myPackage.Save("addresses", obj).

cannot use obj (type *mytables.TableTwo) as type *struct { Id int } in argument to myPackage.Save