protected static $knownScriptsModules = [ 'core' ];
protected static $knownStylesModules = [ 'core', 'widgets', 'toolbars', 'windows' ];
protected static $knownImagesModules = [
protected static $knownScriptsModules = [ 'core' ];
protected static $knownStylesModules = [ 'core', 'widgets', 'toolbars', 'windows' ];
protected static $knownImagesModules = [