[R] Use generic functions, e.g. print, without UseMethod?

[Sigbert Klinke]

Hello,

I have defined a function 'equations(...)' which returns an object with 
class 'equations'. I also defined a function 'print.equations' which 
prints the object. But I did not use 'equations <- function(x, ...) 
UseMethod("equations"). Two questions:

1.) Is this a sensible approach?
2.) If yes, are there any pitfalls I could run in later?

Thanks

Sigbert

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