toRd: Convert an object to Rd
In Rd: Rd Manipulation and Creation

This provides the generic for converting objects to Rd. It extends the core function toRd.

toRd(obj, ...)

\S3method{toRd}{NULL}(obj, ...)

\S3method{toRd}{list}(obj, ..., unnest=NA)

\S3method{toRd}{Rd_string}(obj, ...)

\S3method{toRd}{Rd_tag}(obj, ...)

\S3method{toRd}{Rd}(obj, ...)

\S3method{toRd}{person}(obj, ..., include = c('given', 'family', 'email'))

\S3method{toRd}{name}(obj, ...)

`obj`	object to convert
`...`	passed on to methods
`unnest`	Should the results be unlisted to remove nesting? A value of FALSE indicates that nesting should never be removed, TRUE implies always remove nested elements with class Rd, and when NA, the default, nesting will be removed only if all elements are Rd.
`include`	The parts of the person object to include.

str(toRd(NULL))
toRd(person('John' , 'Doe', email="john@email.com"))
toRd(c( person('John' , 'Doe', email="john@email.com")
      , person('Jane' , 'Poe', email="jane@email.com")
      ))