How to convert a P&D graphs back to a Mesh.

Hi,

I am trying to do an edge contraction by training a segmentation model and during inference extracting the output from the pooling layer. However, the output is in a form of PD graphs which I am unable interpret. 

Is there a function in the repo which converts these graphs back to meshes? Also is there a better way to do edge contraction than the one mentioned above?