func get(name string) (Builder, error) {
	b, ok := builders[name]
	if !ok {
		return nil, errors.Errorf("unknown builder: %q", name)
	}
	return b, nil
}
func get(name string) (Builder, error) {
	b, ok := builders[name]
	if !ok {
		return nil, errors.Errorf("unknown builder: %q", name)
	}
	return b, nil
}
func get ( name string ) ( Builder , error ) { b , ok := builders [ name ] if ! ok { return nil , errors . Errorf ( " " , name ) } return b , nil }
// get gets the named builder from the registry.
get gets the named builder from the registry .