/**
 * Normalizes a MIME type to a standard format.
 *
 * Input: application/problem+json; charset=utf-8
 * Output: application/json
 */
export declare function normalizeMimeType(contentType?: string): `application/json${string}` | `application/xml${string}` | `text/plain${string}` | `text/html${string}` | `application/octet-stream${string}` | `application/x-www-form-urlencoded${string}` | `multipart/form-data${string}` | `*/*${string}` | `application/vnd.${string}+json${string}` | undefined;
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