load.md
In pkgload: Simulate Package Installation and Attach

warn_if_conflicts warns for conflicts and both objects are functions

Code
  (expect_warning(warn_if_conflicts("pkg", e1, e2)))
Output
  <warning/pkgload::conflict>
  Warning:
  -- Conflicts -------------------------------------------------- pkg conflicts --
  x `foo` masks `pkg::foo()`.
  i Did you accidentally source a file rather than using `load_all()`?
    Run `rm(list = c("foo"))` to remove the conflicts.