【ROS2】节点的很多信息，包括订阅者、发布者、服务、动...
/turtlesimSubscribers:
/parameter_events: rcl_interfaces/msg/ParameterEvent
/turtle1/cmd_vel: geometry_msgs/msg/Twist
Publishers:
/parameter_events: rcl_interfaces/msg/ParameterEvent
/rosout: rcl_interfaces/msg/Log
/turtle1/color_sensor: turtlesim/msg/Color
/turtle1/pose: turtlesim/msg/Pose
Service Servers:
/clear: std_srvs/srv/Empty
/kill: turtlesim/srv/Kill
/reset: std_srvs/srv/Empty
/spawn: turtlesim/srv/Spawn
/turtle1/set_pen: turtlesim/srv/SetPen
/turtle1/teleport_absolute: turtlesim/srv/TeleportAbsolute
/turtle1/teleport_relative: turtlesim/srv/TeleportRelative
/turtlesim/describe_parameters: rcl_interfaces/srv/DescribeParameters
/turtlesim/get_parameter_types: rcl_interfaces/srv/GetParameterTypes
/turtlesim/get_parameters: rcl_interfaces/srv/GetParameters
/turtlesim/list_parameters: rcl_interfaces/srv/ListParameters
/turtlesim/set_parameters: rcl_interfaces/srv/SetParameters
/turtlesim/set_parameters_atomically: rcl_interfaces/srv/SetParametersAtomically
Service Clients:
Action Servers:
/turtle1/rotate_absolute: turtlesim/action/RotateAbsolute
Action Clients:
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