methods("predict")
# [1] predict.ar* predict.Arima*
# [3] predict.arima0* predict.glm
# [5] predict.HoltWinters* predict.lm
# [7] predict.loess* predict.mlm*
# [9] predict.nls* predict.poly*
# [11] predict.ppr* predict.prcomp*
# [13] predict.princomp* predict.smooth.spline*
# [15] predict.smooth.spline.fit* predict.StructTS*