code: void stop( Instance instance, PluginInterface plugin ) throws IOException {
  
  		String instancePath = InstanceHelpers.computeInstancePath( instance );
  		if( instance.getStatus() != InstanceStatus.DEPLOYED_STARTED )
  			this.logger.fine( instancePath + " cannot be stopped. Prerequisite status: DEPLOYED_STARTED (but was " + instance.getStatus() + ")." );
  		else
  			stopInstance( instance, plugin, false );
  	}
docs: Stops an instance (prerequisite: DEPLOYED_STARTED).
  @param instance the instance
  @param plugin the associated plug-in
  @throws IOException if something went wrong