inverse_kinematics_sawyer.py: Where does the 7 come from?

[seann999]

pybullet_robots/inverse_kinematics_sawyer.py

Line 51 in 19f4a7d

p.resetJointState(sawyerId,i,jointPoses[qIndex-7])

Why does it subtract 7 from qIndex? Does this work for robots other than Sawyer?