@NotNull
  public static CallTracer get(DebugProcessImpl debugProcess) {
    CallTracer tracer = debugProcess.getUserData(CALL_TRACER_KEY);
    if (tracer == null) {
      tracer = new CallTracer(debugProcess);
      debugProcess.putUserData(CALL_TRACER_KEY, tracer);
    }
    return tracer;
  }
@NotNull
  public static CallTracer get(DebugProcessImpl debugProcess)