@startuml
title "UCM device sequence graph"

start
split
  :Enable device;
  :EnableSequence;
  :Use device;
  :Disable device;
  :DisableSequence;
split again
  :Switch device;
  :Disable old device;
  if (TransitionSequence) then (present)
    :TransitionSequence;
    :Enable new device;
  else (not present)
    :Disable old device;
    :DisableSequence;
    :Enable new device;
    :EnableSequence;
  endif
end split
stop

@enduml