class PrawnHtml::Context

def evaluate_element_styles(element, res)
  styles = element.styles.slice(*Attributes::STYLES_APPLY[:text_node])
  styles.each do |key, val|
    if res.include?(key) && res[key].is_a?(Array)
      res[key] += val
    else
      res[key] = val
    end
  end
end