docs: public InputStream getInputStream(String strFilename)
      {
          InputStream inStream = Utility.getInputStream(strFilename, this.getApplication());
          if (inStream == null)
          	if (this.getParentSession() != null)
          { 
          	Task task = this.getParentSession().getTask();
          	if ((task != null) && (task != this))
          		inStream = task.getInputStream(strFilename);
          }
          return inStream;
      }