import type { Nullable } from "instill-sdk";
export declare function useDeleteNamespaceFile(): import("@tanstack/react-query").UseMutationResult<{
    namespaceId: string;
    knowledgeBaseId: string;
}, Error, {
    fileId: string;
    namespaceId: Nullable<string>;
    knowledgeBaseId: Nullable<string>;
    accessToken: Nullable<string>;
}, unknown>;
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