export declare const useMessagePartSource: () => ({
    readonly type: "source";
    readonly sourceType: "url";
    readonly id: string;
    readonly url: string;
    readonly title?: string;
    readonly providerMetadata?: import("@assistant-ui/core").SourceProviderMetadata;
    readonly parentId?: string;
} & {
    readonly status: import("@assistant-ui/core").MessagePartStatus | import("@assistant-ui/core").ToolCallMessagePartStatus;
}) | ({
    readonly type: "source";
    readonly sourceType: "document";
    readonly id: string;
    readonly url?: undefined;
    readonly title: string;
    readonly mediaType: string;
    readonly filename?: string;
    readonly providerMetadata?: import("@assistant-ui/core").SourceProviderMetadata;
    readonly parentId?: string;
} & {
    readonly status: import("@assistant-ui/core").MessagePartStatus | import("@assistant-ui/core").ToolCallMessagePartStatus;
});
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