export declare type MailchimpMergeField = {
    merge_id: number;
    tag: string;
    name: string;
    type: string;
    required: boolean;
    default_value: string | number | boolean;
};
export declare type GrouparooMergeVar = {
    key: string;
    name: string;
    type: string;
    important: boolean;
};
export declare function getMergeVars(client: any, listId: string): Promise<GrouparooMergeVar[]>;