import { DatabaseContext } from '@contember/engine-system-api';
import { Timer } from '../application';
import { IncomingMessage, ServerResponse } from 'node:http';
export interface NotModifiedCheckResult {
    isModified: boolean;
    setResponseHeader: (response: ServerResponse) => void;
}
export declare class NotModifiedChecker {
    checkNotModified({ request, body, timer, systemDatabase, stageId }: {
        body: any;
        request: IncomingMessage;
        timer: Timer;
        systemDatabase: DatabaseContext;
        stageId: string;
    }): Promise<NotModifiedCheckResult | null>;
}
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