func List(items ...Code) *Statement {
	return newStatement().List(items...)
}
List renders a comma separated list. Use for multiple return functions.
package jen
func Parens(item Code) *Statement {
	return newStatement().Parens(item)
}
func (g *Group) Parens(item Code) *Statement {
	s := Parens(item)
	g.items = append(g.items, s)
	return s
}
func (s *Statement) Parens(item Code) *Statement {
	g := &Group{
		close:     ")",
		items:     []Code{item},
		multi:     false,
		name:      "parens",
		open:      "(",
		separator: "",
	}
	*s = append(*s, g)
	return s
}