@type t() :: %DocuSign.Model.Watermark{
  displayAngle: String.t() | nil,
  enabled: String.t() | nil,
  font: String.t() | nil,
  fontColor: String.t() | nil,
  fontSize: String.t() | nil,
  id: String.t() | nil,
  imageBase64: String.t() | nil,
  transparency: String.t() | nil,
  watermarkText: String.t() | nil
}