code: @Override
    public int getCurrentStackSize() {
      int stackSize = -1;
      if (this.tracingContextMap.containsKey(Thread.currentThread()))
        stackSize = this.tracingContextMap.get(Thread.currentThread()).getMethodStack().size();
      
      return stackSize;
    }
docs: Returns the stack size of the current thread. The value -1 indicates that the current thread isn't registered.
  
  @return the current stack size