code: function(msg) {
        // eslint-disable-next-line no-console
        if (console.debug) {
          // eslint-disable-next-line no-console
          console.debug.apply(console, arguments);
        } else {
          // eslint-disable-next-line no-console
          console.log.apply(console, arguments);
        }
      }
docs: Log a debug message. Invokes `console.debug` if available, otherwise `console.log`.  Overrides should be written with support for substitution strings in mind. See the `console.log` documentation.