benzenediazonium fluoroborate is heated with nano2 then it forms

When benzenediazonium fluoroborate is heated with nano2 forms – nitrobenzene as a product. When benzenediazonium fluoroborate is heated with nano2 forms? When benzene diazonium chloride react with HBF4. it give Fluoroboric acid. and again fluoroboric acid are heated with nano2 then it forms nitrobenzene, N2 and NaBF4 are also formed.