dependsl not implemented

edit

detail:

adminyin@adminyin-System:~$ cd catkin_ws/src/
adminyin@adminyin-System:~/catkin_ws/src$ ls
beginner_tutorials  CMakeLists.txt
adminyin@adminyin-System:~/catkin_ws/src$ rospack dependsl beginner_tutorials
[rospack] Error: command dependsl not implemented
adminyin@adminyin-System:~/catkin_ws/src$ rospack depends
depends            depends-indent     depends-msgsrv     depends-on1
depends1           depends-manifests  depends-on         depends-why
adminyin@adminyin-System:~/catkin_ws/src$ rospack depends beginner_tutorials
[rospack] Error: no such package beginner_tutorials
adminyin@adminyin-System:~/catkin_ws/src$ cd ..
adminyin@adminyin-System:~/catkin_ws$ . ~/catkin_ws/devel/setup.bash 
adminyin@adminyin-System:~/catkin_ws$ cd src/
adminyin@adminyin-System:~/catkin_ws/src$ ls
beginner_tutorials  CMakeLists.txt
adminyin@adminyin-System:~/catkin_ws/src$ rospack depends beginner_tutorials 
cpp_common
rostime
roscpp_traits
roscpp_serialization
genmsg
genpy
message_runtime
catkin

computer environment:

Linux adminyin-System 3.16.0-57-generic #77~14.04.1-Ubuntu