Use of VERBOSE in C++ files

I wanted to view the access code, data in gr_correlate_access_code and
gr_framer_sink_1 programs. I found the VERBOSE in both programs. I set
this
to 1. But i do not see any data. What is the purpose of this VERBOSE in
that
case? Is it only to view data while running C++ files?

Thank you
Udaya

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