How do I search for the source code of this function that is from an open source library?

I am trying to understand what this function does in line 178 of https://github.com/PhilippJKratzer/humoro/blob/master/humoro/player_pybullet.py

p.resetJointStatesMultiDof(self._humans[human], idxes, values)

where p is an alias for pybullet https://pypi.org/project/pybullet/. However, I am unable to find the source code of resetJointStatesMultiDof even after going through the github webpage at https://github.com/bulletphysics/bullet3. Could someone kindly assist?