export declare const requireJsonContent: () => (req: {
    headers: {
        [x: string]: string;
    };
}, res: {
    status: (arg0: number) => {
        (): any;
        new (): any;
        send: {
            (arg0: string): void;
            new (): any;
        };
    };
}, next: () => void) => void;
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