module Playbook::Height

def height_props
  selected_props = height_options.keys.select { |sk| try(sk) }
  return nil unless selected_props.present?
  selected_props.map do |k|
    height_value = send(k)
    "height_#{height_value}" if height_values.include? height_value.to_s
  end.compact.join(" ")
end