export interface PlanCustomField {
    /** Custom field input type. */
    field_type: PlanCustomField.FieldType;
    /** Custom field ID, prefixed `field_`. */
    id: string;
    /** Field label shown to customer at checkout. */
    name: string;
    /** Field position on checkout form. */
    order: number;
    /** Placeholder text shown in the empty field. `null` if none is set. */
    placeholder: string | null;
    /** Whether the customer must complete this field to check out. */
    required: boolean;
}
export declare namespace PlanCustomField {
    /** Custom field input type. */
    const FieldType: {
        readonly Text: "text";
    };
    type FieldType = (typeof FieldType)[keyof typeof FieldType];
}