I wanted to utilize some of messages below for my robotics application, but I am not sure what type of inputs should I be using. I looked into the documentation, but the document shows only listing inputs and outputs without an explanation (https://ignitionrobotics.org/api/msgs/6.0/classignition_1_1msgs_1_1EntityFactory.html#ab0adce9c809c1b6c223a076a15b9bf47)

Is there any way to learn the usage of specific messages in ignition in general?

/gazebo/resource_paths/add

/gazebo/resource_paths/get

/gazebo/worlds

/gui/follow

/gui/follow/offset

/gui/move_to

/gui/move_to/pose

/gui/record_video

/gui/screenshot

/gui/transform_mode

/gui/view/collisions

/gui/view_angle

/marker

/marker/list

/marker_array

/world/default/control

/world/default/create

/world/default/create_multiple

/world/default/disable_collision

/world/default/enable_collision

/world/default/generateworldsdf

/world/default/gui/info

/world/default/level/set_performer

/world/default/light_config

/world/default/playback/control

/world/default/remove

/world/default/scene/graph

/world/default/scene/info

/world/default/set_physics

/world/default/set_pose

/world/default/state

/world/default/state_async

/world/default/visual_config

/world/shapes/control

/world/shapes/create /world/shapes/createmultiple /world/shapes/disablecollision /world/shapes/enablecollision /world/shapes/generateworldsdf /world/shapes/gui/info /world/shapes/level/setperformer /world/shapes/lightconfig /world/shapes/playback/control /world/shapes/remove /world/shapes/scene/graph /world/shapes/scene/info /world/shapes/setphysics /world/shapes/setpose /world/shapes/state /world/shapes/stateasync /world/shapes/visual_config