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Predict function in forecast.holtwinters function

I am looking at forecast package HoltWinters method code from this link (for code understanding purpose). I couldn't find which "R" source file has this predict function defined in to look at source code. Can some one please help me on how can trace this function to a specific source code file?

 pred <- predict(object,n.ahead=h,prediction.interval=TRUE,level=level[1]/100)

Any help would be appreciated.

Solution

  • It is not exported, but you can find it using the ::: operator:

    forecast:::predict.HoltWinters
# function (object, n.ahead = 1, newxreg = NULL, se.fit = TRUE, ...)
#   ....