sets

fmt.Printf("func %s(puid string) bool {\n  switch puid {\n  case \"%s\":\n    return true\n  }\n  return false\n}", fnName, strings.Join(Sets(tika...), "\",\""))

Output:

func IsText(puid string) bool {
  switch puid {
  case "fmt/14","fmt/15","fmt/16","fmt/17","fmt/18","fmt/19","fmt/20","fmt/37","fmt/38","fmt/39","fmt/40","fmt/95","fmt/144","fmt/145","fmt/146","fmt/147","fmt/148","fmt/157","fmt/158","fmt/276","fmt/354","fmt/412","fmt/473","fmt/476","fmt/477","fmt/478","fmt/479","fmt/480","fmt/481","fmt/488","fmt/489","fmt/490","fmt/491","fmt/492","fmt/493","fmt/523","fmt/597","fmt/599","fmt/609","fmt/754","x-fmt/45","x-fmt/111","x-fmt/273","x-fmt/274","x-fmt/275","x-fmt/276":
    return true
  }
  return false
}