def save_all
            output_all do |document, options|
                File.open(document.name, 'w') do |file|
                    document.xml.write_xml_to(file, options)
                end
            end
        end
def save_all
            output_all do |document, options|
                File.open(document.name, 'w') do |file|
                    document.xml.write_xml_to(file, options)
                end
            end
        end
Save all loaded XML files

 Pretty prints the XML if {#pretty} is enabled.

 @return [void]