Can I use digital_mpsk_snr_est_cc block in OFDM?

Hi all,

I want to use digital_mpsk_snr_est_cc block in OFDM especially
benchmark_rx.py

However, I heard that the digital_mpsk_snr_est_cc block can not be used
in OFDM flowgraph. Is it right??

If that sound is right, then what can I do to estimate SNR in
benchmark_rx.py(OFDM)??