Check if the Workbench launcher is available and configured to support
Workbench jobs; that is, jobs normally launched by the user through
the RStudio IDE's user interface.
See also
Other job-launcher functionality:
launcherConfig(),
launcherContainer(),
launcherControlJob(),
launcherGetInfo(),
launcherGetJob(),
launcherGetJobs(),
launcherHostMount(),
launcherNfsMount(),
launcherPlacementConstraint(),
launcherResourceLimit(),
launcherSubmitJob(),
launcherSubmitR()