import type { ManifestProbeExtractor } from "../payload.ts";
import type { DependencyVersion } from "../../types.ts";
export type ExtensionsResult = {
    extensions: Record<string, number>;
};
export declare class Extensions implements ManifestProbeExtractor<ExtensionsResult> {
    #private;
    level: "manifest";
    next(_: string, version: DependencyVersion): void;
    done(): {
        extensions: any;
    };
}
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