transition.md
In IxPopDyMod: Framework for Tick Population and Infection Modeling

produces expected output with valid input

Code
  trans[names(trans) != "fun"]
Output
  $from
  [1] "a"

  $to
  [1] "b"

  $transition_type
  [1] "probability"

  $mortality_type
  NULL

  $predictors
  NULL

  $parameters
  $a
  [1] 1

  attr(,"class")
  [1] "parameters"

works with defaults

Code
  transition(from = "a", to = "b", fun = f, transition_type = "probability")
Output
  ** A transition
  ** a -> b 
  Transition type: probability
  Parameters: 
  Function: () NULL