*enter()/*exit()
  calls.## S3 method for class 'Verbose':
enter(this, ..., indent=this$indentStep, sep="", suffix="...", level=this$defaultLevel)
  ## S3 method for class 'Verbose':
enterf(this, fmtstr, ..., indent=this$indentStep, sep="", suffix="...",
  level=this$defaultLevel)sprintf() format string, which together with
   ... constructs the message.character string.character string to be appended to the end of the message.numeric value to be compared to the threshold.Verbose.