export interface UpdateSubscriptionItemRequest {
    /**
     * ID of the subscription item. String starting with **subi_**.
     */
    subscription_item: `subi_${string}`;
    /**
     * A JSON object defined by the client.
     */
    metadata?: object;
    /**
     * Determines whether the charge is prorated when a subscription item is switched from one subscription to another in a billing cycle.
     */
    prorate?: boolean;
    /**
     * Indicates the date in the middle of the billing period that is the start or end of the prorated charges. Relevant to the first and last billing cycles.
     */
    proration_date?: number;
    /**
     * The number of units of the product or service.
     */
    quantity?: number;
}
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