/** Gets the completions at the passed offset. */
    public ICompletionProposal[] getCompletions(String text, String actTok, int offset)
        throws Exception {
      this.text = text;
      this.actTok = actTok;
      this.offset = offset;
      PyStackFrame stackFrame = getCurrentSuspendedPyStackFrame(null);

      if (stackFrame != null) {
        AbstractDebugTarget target =
            (AbstractDebugTarget) stackFrame.getAdapter(IDebugTarget.class);
        if (target != null) {
          GetCompletionsCommand cmd =
              new GetCompletionsCommand(
                  target, actTok, stackFrame.getLocalsLocator().getPyDBLocation());
          cmd.setCompletionListener(this);
          target.postCommand(cmd);
        }
        return waitForCommand();
      }
      return EMPTY_COMPLETION_PROPOSALS;
    }