class SimpleForm::Wrappers::Builder

def wrapper(name, options = nil)
  if block_given?
    name, options = nil, name if name.is_a?(Hash)
    builder = self.class.new(@options)
    options ||= {}
    options[:tag] = :div if options[:tag].nil?
    yield builder
    @components << Many.new(name, builder.to_a, options)
  else
    raise ArgumentError, "A block is required as argument to wrapper"
  end
end