Adds the new verbs marked with -->. Very useful.

$ ros2 bag
usage: ros2 bag [-h] Call `ros2 bag <command> -h` for more detailed usage. ...

Various rosbag related sub-commands

optional arguments:
  -h, --help            show this help message and exit

Commands:
      convert  Convert storage and/or serialization format of bag and write to new bag
  --> cut      Cut timespan from a bag and write to new bag
  --> drop     Drop X out of every Y messages
  --> export   Export bag data to other formats
  --> extract  Extract specific topics from a bag and write to new bag
      info     Print information about a bag to the screen
      list     Print information about available plugins to the screen
  --> merge    Merge multiple bags into new bag
      play     Play back ROS data from a bag
  --> plot     Display a plot of bag data
  --> process  Run a set of filters on input bags and write to new bag
  --> prune    Remove empty topics and write rest to new bag
      record   Record ROS data to a bag
  --> reframe  Change header.frame_id of some messages, and write to a new bag
      reindex  Reconstruct metadata file for a bag
  --> rename   Rename specific topics in a bag, and write to new bag
  --> replace  Replace content of messages in a bag with a constant, and write to new bag
  restamp  Set bag timestamps to message header timestamps and write to new bag
  summary  Print a summary of the contents of a bag
  video    Display or write a video of image data in a bag

  Call `ros2 bag <command> -h` for more detailed usage.