code: def _handle_sdp_target_state_updated(sdp_state: SDPState):
      
      LOG.info('Handling SDP target state updated event...')
      LOG.info('SDP target state: %s', sdp_state.target_state)
  
      # Map between the SDP target state and the service target state?
      if sdp_state.target_state == 'off':
          _update_services_target_state('off')
  
      # TODO: Work out if the state of SDP has reached the target state.
  
      # If yes, update the current state.
      sdp_state.update_current_state(sdp_state.target_state)
docs: Respond to an SDP target state change event.
  
      This function sets the current state of SDP to the target state if that is
      possible.
  
      TODO(BMo) This cant be done as a blocking function as it is here!