export type OperationType = 'lessThan' | 'lessOrEqual' | 'equals' | 'greaterOrEqual' | 'notEquals';
export type FilterType = {
    fields?: {
        [key: string]: {
            operation: OperationType;
            value: string;
        };
    };
    sort?: string;
};
export declare const filterFormatter: (filter: FilterType) => string | undefined;