@type t() :: %Exograph.Reference{
  arity: non_neg_integer() | nil,
  column: pos_integer() | nil,
  file_id: integer(),
  fragment_id: integer() | nil,
  id: integer() | nil,
  kind: atom(),
  line: pos_integer() | nil,
  module: String.t() | nil,
  name: String.t(),
  package_id: integer() | nil,
  package_version_id: integer() | nil,
  qualified_name: String.t()
}