export interface CreateSubscriptionItemRequest {
    /**
     * A JSON object defined by the client.
     */
    metadata?: object;
    /**
     * ID of the plan assigned to this subscription item.
     */
    plan: string;
    /**
     * 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 of the prorated charges.
     */
    proration_date?: number;
    /**
     * The number of units of the service defined in the plan.
     */
    quantity?: number;
    /**
     * ID of the subscription that this item belongs to. String starting with **sub_**.
     */
    subscription: `sub_${string}`;
}
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