Does ArgMax support only one blob?

[cook]

There is a contradiction in the definition of the ArgMax layer:

From the below code, the member one_blob_only is false,

ArgMax::ArgMax()
{
}

But from the definition of the class ArgMax, forward(const Mat&, Mat&) is declared rather than forward(const std::vector<Mat>&, std::vector<Mat>&), so the one_blob_only should be true.

class ArgMax : public Layer
{
public:
   //...
    virtual int forward(const Mat& bottom_blob, Mat& top_blob) const;
   //...