import { Session, FundamentalAndReference } from '@refinitiv-data/types';
type RealTimeFields = string | Array<string | FundamentalAndReference.UdfField> | FundamentalAndReference.UdfField;
export declare class FundamentalReferenceUtil {
    private static getFieldName;
    private static isNonRealTimeField;
    static validateFields(fields: RealTimeFields): RealTimeFields;
    static filterRealTimeFields(fields: RealTimeFields): RealTimeFields;
    static formatItems(items: RealTimeFields): string[] | FundamentalAndReference.UdfField[] | Array<string | FundamentalAndReference.UdfField>;
    static formatUdfFields(fields: RealTimeFields): FundamentalAndReference.UdfField[];
    static getWaitDuration(duration: number): number;
    static formatResponseHeaders(headers: FundamentalAndReference.UdfResponseHeader[][]): FundamentalAndReference.ResponseHeader[];
    static validateUdfErrors(response: any): void;
    static isPlatformSession(session: Session): boolean;
}
export {};