AboutDialog({Key key, String applicationName, String applicationVersion, Widget applicationIcon, String applicationLegalese, List<Widget> children })

Creates an about box.

The arguments are all optional. The application name, if omitted, will be derived from the nearest Title widget. The version, icon, and legalese values default to the empty string.

Source 

AboutDialog({
  Key key,
  this.applicationName,
  this.applicationVersion,
  this.applicationIcon,
  this.applicationLegalese,
  this.children,
}) : super(key: key);