if ( this.process == null )
checkObjectAttribute( "process", this.process );  ProcessContext context = getProcessContext();  ProcessEngine  engine  = null; ProcessContext spawned = null;  if ( context == null )
    public void doTag(XMLOutput output) throws Exception    {        if ( this.process == null )        {            throw new MissingAttributeException( "process" );        }        ProcessContext context = getProcessContext();        ProcessEngine  engine  = getProcessEngine();        engine.spawn( getProcess(),                      context );    }