module Playbook::LineHeight

def line_height_props
  selected_props = line_height_options.keys.select { |sk| try(sk) }
  return nil unless selected_props.present?
  selected_props.map do |k|
    line_height_value = send(k)
    "line_height_#{line_height_value}" if line_height_values.include? line_height_value
  end.compact.join(" ")
end