how can I install pr2_mechanism_controllers?
rosdep install pr2_mechanism_controllers
ERROR: Rosdep cannot find all required resources to answer your query Missing resource pr2_mechanism_controllers ROS path [0]=/opt/ros/indigo/share/ros ROS path [1]=/home/duro/catfish/src ROS path [2]=/home/duro/uwsim_ws/src ROS path [3]=/opt/ros/indigo/share ROS path [4]=/opt/ros/indigo/stacks