setKnownInliers and setKnownOutliers in gtsam python wrapper

[AnshShah3009]

what does it mean when i set an inlier or outlier, it says that the input is a keyvector but that means it is setting a node as an Inlier and not an edge, Can someone clear this up. Example Code : https://github.com/AnshShah3009/DPGO_GTSAM/blob/master/notebooks/Gnc.ipynb