export function toDeltaTransformer(options: any, state: any): any;
export function N2kMapper(options: any): void;
export class N2kMapper {
    constructor(options: any);
    state: {};
    unknownPGNs: {};
    customPgns: {};
    options: any;
    n2kOutIsAvailable(listener: any, event: any): void;
    n2kOutEvent: any;
    n2kListener: any;
    requestMetaData(dst: any, pgn: any): Promise<any>;
    requestMetaPGNs(dst: any, pgns: any): Promise<void>;
    checkSrcMetasAndRetry(src: any): void;
    requestAllMeta(): void;
    toDelta(n2k: any): {
        updates: {
            source: {
                label: string;
                type: string;
                pgn: number;
                src: any;
            };
            timestamp: string;
            values: any;
        }[];
    } | undefined;
}
export function toDelta(n2k: any, state: any, customPgns?: {}): {
    updates: {
        source: {
            label: string;
            type: string;
            pgn: number;
            src: any;
        };
        timestamp: string;
        values: any;
    }[];
} | undefined;
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