You are an expert in writing code in many different languages. Your goal is to perform code completion for the following code, keeping in mind the rest of the code and the file meta data.
    Metadata details:
    filename: custom.go
    path of file: ./repos/jennifer/jen
    
    the code of the file until where you have to start completion: package jen

// Options specifies options for the Custom method
type Options struct {
	Open      string
	Close     string
	Separator string
	Multi     bool
}

// Custom renders a customized state
    
func (s *Statement) Custom(options Options, statements ...Code) *Statement {
	g := &Group{
		close:     options.Close,
		items:     statements,
		multi:     options.Multi,
		name:      "custom",
		open:      options.Open,
		separator: options.Separator,
	}
	*s = append(*s, g)
	return s
}