[R] Is nested namespace supported?

[Peng Yu]

On Thu, Jan 7, 2010 at 11:10 AM, Peng Yu <pengyu.ut at gmail.com> wrote:
> I don't find where in the R document the discussion of nested
> namespace is. If there is nested namespace supported in R, could
> somebody let me know whether the document is?

Could somebody let me know if there is nested name space supported?
For example, is it possible to define a function in the name space
'nested_namespace' which is nested in the name space 'some_namespace'?

some_namespace:::nested_namespace:::a_function()