Method setK

src/tests/include/BlasBase.h:170–174

    bool useK() const           { return useK_; };
    size_t K() const            { return K_; }
    void setK(size_t K)
    {
        K_ = K;
        useK_ = true;
    }

    bool useIncX() const        { return useIncX_; };
    int incX() const            { return incX_; }