import type { ColumnCodec } from './column';
import type { BinaryReader } from '../protocol/binary_reader';
import type { BinaryWriter } from '../protocol/binary_writer';
export declare class MapCodec implements ColumnCodec {
    private readonly keyCodec;
    private readonly valueCodec;
    constructor(keyCodec: ColumnCodec, valueCodec: ColumnCodec);
    read(reader: BinaryReader, rows: number): Record<string, unknown>[];
    write(writer: BinaryWriter, values: unknown[]): void;
}