@type t() :: %Figler.Schema.Mention{
  file_key: String.t() | nil,
  id: Figler.Schema.GUID.t() | nil,
  mentioned_by_user_id: String.t() | nil,
  mentioned_by_user_id_int: non_neg_integer() | nil,
  mentioned_user_group_id: String.t() | nil,
  mentioned_user_id: String.t() | nil,
  mentioned_user_id_int: non_neg_integer() | nil,
  source: Figler.Schema.MentionSource.t() | nil
}