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import { charset } from "../../../deps.ts";import type { OpineRequest } from "../../types.ts";
/** * Get the charset of a request. * * @param {OpineRequest} req * @returns {string|undefined} * @private */export function getCharset(req: OpineRequest): string | undefined {  try {    return (charset(req.headers.get("Content-Type") || "") || "").toLowerCase();  } catch (_e) {    return undefined;  }}