# Functions
NewParallelStopper returns a new parallelStopper.
NewSerialStopper returns a new serialGroup.
NewStarter returns a new starter.
# Interfaces
Restartable represents a startable and stopable object.
Startable represents a startable object.
Starter starts a group of startable objects from a data pipeline.
Stoppable represents a stoppable object.
Stopper stops a group of stoppable objects from a data pipeline.