methods, utils, tools, R.methodsS3 (>= 1.7.0)
methods, utils, tools, R.methodsS3 (>= 1.8.0)
methods, utils, tools, R.methodsS3 (>= 1.8.1)
methods, utils, tools, R.methodsS3 (>= 1.7.1)
LGPL version 2.1 or newer (the releases)