Here are the classes, structs, unions and interfaces with brief descriptions:

[detail level 12345]

Nark
Nsystem
Ncomponent
Nbase_component
CBaseComponent
CSimToRealComponent
Nrobot
CControlType
CRobot
Nsensor
CSensor
Nsim_component
CSimComponent
Ndriver	Ark system driver package
Ncomponent_driver	Base component driver definitions
CComponentDriver
Nrobot_driver	Robot driver base classes
CControlType	Supported control modes for robot joints
CRobotDriver	Abstract driver interface for robots
CSimRobotDriver	Base class for drivers controlling simulated robots
Nsensor_driver	Sensor driver base definitions
CCameraDriver	Base class for camera sensor drivers
CLiDARDriver	Abstract base class for LiDAR sensor drivers
CSensorDriver	Abstract driver interface for sensors
CSensorType	Enumeration of supported sensor types
Nsimulation
Nsimulator_backend
CSimulatorBackend
Nsimulator_node
CSimulatorNode
Ntools
Nark_graph
Nark_graph
CArkGraph
CBaseGraph
CCommsInfo
CListenerInfo
CNetworkInfo
CNodeInfo
CPublisherInfo
CServiceInfo
CSubscriberInfo
Ndata_logging
Nlcm_to_csv
CLCMLogParser
Nlauncher
CNodeExecutor
CNodeProcessInfo
CTargetType
Nlog
Cbcolors	This class contains color codes to be used in the log messages to provide visual cues for different log levels
CCustomFormatter	CustomFormatter for applying color coding to log levels and including timestamp
Nros_bridge
Nark_ros_bridge
CArkRosBridge
Nark_env
CArkEnv	ArkEnv base class
Ncomm_handler
Ncomm_handler
CCommHandler	Base class for communication handlers, used for managing communication between different nodes
Nlistener
CListener	A class for receiving and processing messages from a specific channel using an LCM subscriber
Nmulti_channel_listener
CMultiChannelListener
Nmulti_channel_publisher
CMultiChannelPublisher	Publisher that manages multiple communication channels
Nmulti_comm_handler
CMultiCommHandler
Npublisher
CPublisher	A Publisher class that extends the CommHandler base class
Nservice
CService
Nsubscriber
CSubscriber	A subscriber for listening to messages on a communication channel
Ncomm_infrastructure
Nbase_node
CBaseNode	Base class for nodes that interact with the LCM system
Ncomm_endpoint
CCommEndpoint	Base class for nodes that interact with the LCM system
Nendpoint
CEndPoint
Nhybrid_node
CHybridNode	Base class for nodes that interact with the LCM system
Ninstance_node
CInstanceNode	Base class for nodes that interact with the LCM system
Nregistry
CRegistry
Nscript_node
CScriptNode	Base class for nodes that interact with the LCM system
Nimage_viewer
CImageViewNode
Npybullet_backend
CPyBulletBackend
Npybullet_camera_driver
CBulletCameraDriver
CCameraType
Npybullet_lidar_driver
CBulletLiDARDriver
CLiDARType
Npybullet_multibody
CPyBulletMultiBody
CSourceType
Npybullet_robot_driver
CBulletRobotDriver
Nrate
CRate	A convenience class for sleeping in a loop at a specified rate using perf_counter_ns for high precision
Nspaces	Utility classes defining action and observation spaces
CActionSpace	A class representing a space where actions are taken
CObservationSpace	A class representing an observation space that listens for observations over LCM and processes them
CSpace	An abstract base class for different types of spaces
Nstepper
CStepper	Convenience class for stepping a callback at a specified rate