code: func SetTextOutput(re *regexp.Regexp, output TextOutput) {
  	DefaultLoggerCollection.SetTextOutput(re, output)
  }
docs: // SetTextOutput will set the current output interface for all loggers on the
  // default collection with names that match a provided regular expression. If
  // the regular expression is nil, then all loggers match. Note that not every
  // handler is guaranteed to support text output and a text output interface
  // will only apply to text-oriented and unstructured handlers.