Defines a billing plan update response object.
t() :: %DocuSign.Model.BillingPlanUpdateResponse{ accountPaymentMethod: String.t(), billingPlanPreview: BillingPlanPreview, currencyCode: String.t(), includedSeats: String.t(), paymentCycle: String.t(), paymentMethod: String.t(), planId: String.t(), planName: String.t() }