Two methods to set torques and speed limits for the robot parts?

[simheo]

For each part (head, left arm, right arm), two methods are available to set the torques and the speed limits:

reachy.l_arm.set_torque_limit()  # from arm.py
reachy.l_arm.set_torque_limits()   # from joints_based_part.py

reachy.l_arm.set_speed_limit()  # from arm.py
reachy.l_arm.set_speed_limits()   # from joints_based_part.py

Is this normal?