
  [;1m-spec get_keys() -> [Key] when Key :: term().[0m

[;;4mSince[0m:
  OTP 18.0

  Returns a list of all keys present in the process dictionary. The
  items in the returned list can be in any order. Example:

    > put(dog, {animal,1}),
    put(cow, {animal,2}),
    put(lamb, {animal,3}),
    get_keys().
    [dog,cow,lamb]
