lib/logger.js
function warning() {
  var args = [LEVELS.WARNING].concat(slice.apply(arguments));
  return this.log.apply(this, args);
}
function warning() {
  var args = [LEVELS.WARNING].concat(slice.apply(arguments));
  return this.log.apply(this, args);
}
function warning ( ) { var args = [ LEVELS . WARNING ] . concat ( slice . apply ( arguments ) ) ; return this . log . apply ( this , args ) ; }
Log a warning message.
Log a warning message .