Function matchKey

github-actions/browserstack/set-browserstack-env.js:10963–10969

(mockDispatch2, { path: path4, method, body, headers })

        if (typeof match === "function") {
          return match(value) === true;
        }
        return false;
      }
      function lowerCaseEntries(headers) {
        return Object.fromEntries(
          Object.entries(headers).map(([headerName, headerValue]) => {
            return [headerName.toLocaleLowerCase(), headerValue];
          })
        );
      }