Go totally has a method_exists() solution. It’s done with defining an interface and then doing a type assertion.

Here’s some sample code:

type HasColorMethod interface {
 Color() string
}
func PrintColor(thing interface{}) {
 if c, ok := thing.(HasColorMethod); ok {
  fmt.Println(c.Color())
 } else {
  fmt.Println("missing color method")
 }
}

You can see/run an example here.