// Playground for https://stackoverflow.com/a/56699658/11458991
 
package main
 
import (
	"fmt"
	"strings"
)
 
// RowID stores the ID of a single row in a table. An ID can be a composite of multiple columns
type RowID []string
 
// String implements Stringer interface for RowID
func (r RowID) String() string {
	return fmt.Sprintf("[%s]", strings.Join(r, ", "))
}
 
func PrintChange(id fmt.Stringer) {
	fmt.Println(id)
}
 
func main() {
	rowIDs := []RowID{
		{"1", "2"},
		{"22"},
	}
 
	PrintChange(rowIDs[0])
 
	for _, id := range rowIDs { fmt.Println(id) }
}

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