Support for importing & exporting BPMN in GOJS

I am evaluating drawing tools for one of my products. The main requirements for the drawing tool are

  1. Consume BPMN from external bpmn tools.
    Essentially, import a bpmn XML to GOJS and then work with the drawing.

  2. Allow to export the bpmn XML

Are there available as part of GOJS?

The BPMN sample does not read or write any XML-formatted data. However I know that a number of customers have implemented that themselves.