# File lib/pdf/writer/object/viewerpreferences.rb, line 66 66: def to_s 67: res = "\n#{@id} 0 obj\n<< " 68: Preferences.each do |s| 69: v = __send__("#{s.downcase}".intern) 70: res << "\n/#{s} /#{v}" unless v.nil? 71: end 72: res << "\n>>\n" 73: end