rd-find-link-files.md
In roxygen2: In-Line Documentation for R

generates informative warnings

Code
  tag <- roxy_test_tag()
  find_topic_filename("11papaya", "foo", tag)
Message
  x test.R:1: @test refers to unavailable topic 11papaya::foo.
  Caused by error in `find.package()`:
  ! there is no package called '11papaya'
Output
  [1] "foo"
Code
  find_topic_filename("stringr", "foofofofoo", tag)
Message
  x test.R:1: @test refers to unavailable topic stringr::foofofofoo.
Output
  [1] "foofofofoo"