Tells if all verbose messages should be
Tells if verbosity is on.
Prints out a message (on sdtout) if verbose mode is on.
Prints out a message (on sdtout) if the verbosity level is greater than a given value.
lverbose(val) lsilent()
is.verbose()
vmessage(...)
lmessage(..., level = 1L, appendLF = TRUE)
...
cat
cat
.lverbose
.cat
.