@type t() :: %XmtpElixirSdk.Types.CreateGroupOptions{
  app_data: String.t() | nil,
  custom_permission_policy_set:
    XmtpElixirSdk.Types.PermissionPolicySet.t() | nil,
  description: String.t() | nil,
  disappearing: XmtpElixirSdk.Types.DisappearingSettings.t() | nil,
  image_url: String.t() | nil,
  name: String.t() | nil,
  permissions: XmtpElixirSdk.Types.group_permissions_preset() | nil
}