favor.md
In conflicted: An Alternative Conflict Resolution Strategy

trailing () is optional

Code
  conflicts_prefer(dplyr::lag, dplyr::filter())
Message
  [conflicted] Will prefer dplyr::lag over any other package.
  [conflicted] Will prefer dplyr::filter over any other package.

errors if invalid form

Code
  conflicts_prefer(1)
Condition
  Error in `conflicts_prefer()`:
  ! All arguments must be in form `pkg::fun` or `pkg::fun()`.
Code
  conflicts_prefer(foo())
Condition
  Error in `conflicts_prefer()`:
  ! All arguments must be in form `pkg::fun` or `pkg::fun()`.
Code
  conflicts_prefer(dplyr::filter(a = 1))
Condition
  Error in `conflicts_prefer()`:
  ! All arguments must be in form `pkg::fun` or `pkg::fun()`.