import type * as ProtoBuf from 'protobufjs';
declare const META_NULLS = "__meta_nulls";
declare const META_EMPTY = "__meta_empty";
declare type Data = Record<string, any>;
declare type Message = {
    [META_NULLS]?: number[];
    [META_EMPTY]?: number[];
} & ProtoBuf.Message;
/**
 * Responsible for processing of all custom meta fields of decoded message type.
 * More info: https://wiki/display/OpenAPI/Delta+compression+implementation+of+ProtoBuffers
 */
declare class MetaProtobuf {
    /**
     * Process data using message metadata. Iterate through each field and process supported metadata keys.
     *
     * @param message - Protobuf Message Type object.
     * @param data - JSON object. Object get's mutated.
     * @returns  The result of meta processing.
     */
    process(message: Message | null, data: Data | null): Data | null;
    private iterateTree;
    private processChild;
    private processData;
}
export default MetaProtobuf;