func (s *Booleans) String() string {
	return fmt.Sprintf("%v", *s)
}
String to string
package gcli
import (
	"fmt"
	"strconv"
	"github.com/gookit/goutil/strutil"
)
type Ints []int
func (s *Ints) String() string {
	return fmt.Sprintf("%v", *s)
}
func (s *Ints) Set(value string) error {
	intVal, err := strconv.Atoi(value)
	if err == nil {
		*s = append(*s, intVal)
	}
	return err
}
type Strings []string
func (s *Strings) String() string {
	return fmt.Sprintf("%v", *s)
}
func (s *Strings) Set(value string) error {
	*s = append(*s, value)
	return nil
}
type Booleans []bool