a = ???*0*
- *0* arguments[0]
  ⚠️  function calls are not analysed yet

b = ???*0*
- *0* arguments[1]
  ⚠️  function calls are not analysed yet

c = (...) => [`${a}${b}`, a]

d = ["12", "1"]

e = ("12" | ???*0*)
- *0* unknown mutation
  ⚠️  This value might have side effects

f = ("1" | ???*0*)
- *0* unknown mutation
  ⚠️  This value might have side effects