Activating the TAdvGridPDFIO

I am attempting to use the TAdvGridPDFIO to print to pdf from a grid. How do I activate it?  There appears to be no 'execute', and no documentation. I have searched the source, and the generate function is not exposed by the interface.  What's the secret?  Thanks!

TAdvGridPDFIO has the method Save() that generates the PDF to the filename specified.