R help - May 2011 - how could I use function in-visible to user in my code?

Dear R user,

How could I use function in-visible to user in my code? For example
'survfitKM' or 'survfit.formula' in package survival. These
functions
are in-visible to user.

Thanks,
Shuguang

Shuguang Sun <shuguang <at> gmail.com> writes:
> How could I use function in-visible to user in my code? For example
> 'survfitKM' or 'survfit.formula' in package survival. These
functions
> are in-visible to user.
 ?":::"

e.g.

survival:::survfit.formula