Set the left side and right side margin when generate PDF

Thanks for the great plugin, now I am using the plugin to generate the PDF

and in the doc, there is a function:

$request->setMargin('0cm');

The problem is , it received a string, and doesn't seem can assign the different margin for different dimension,

are there any syntax for it?

Thanks a lot.

[jonnnnyw]

It looks like you can do it in PhantomJS, according to the documentation.

Documentation

I will look at adding it to the library.