@type t() :: %Xema.CastError{
  __exception__: term(),
  error: struct() | nil,
  key: String.t() | atom() | nil,
  message: String.t() | nil,
  path: [atom() | integer() | String.t()] | nil,
  required: [atom()] | nil,
  to: atom() | list() | nil,
  value: term() | nil
}