module Playbook::FlexShrink

def flex_shrink_props
  selected_props = flex_shrink_options.keys.select { |sk| try(sk) }
  return nil unless selected_props.present?
  selected_props.map do |k|
    flex_shrink_value = send(k)
    if flex_shrink_value.is_a?(Hash)
      flex_shrink_value.map do |media_size, shrink_value|
        "flex_shrink_#{media_size}_#{shrink_value}" if flex_shrink_values.include? shrink_value.to_s
      end
    else
      "flex_shrink_#{flex_shrink_value}" if flex_shrink_values.include? flex_shrink_value.to_s
    end
  end.compact.join(" ")
end