builder/builder.go
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
}
// get gets the named builder from the registry.