Method has

github-actions/browserstack/set-browserstack-env.js:12503–12516

(name)

        }
        // https://fetch.spec.whatwg.org/#dom-headers-has
        has(name) {
          webidl.brandCheck(this, _Headers);
          webidl.argumentLengthCheck(arguments, 1, "Headers.has");
          const prefix = "Headers.has";
          name = webidl.converters.ByteString(name, prefix, "name");
          if (!isValidHeaderName(name)) {
            throw webidl.errors.invalidArgument({
              prefix,
              value: name,
              type: "header name"
            });
          }
          return __privateGet(this, _headersList).contains(name, false);
        }
        // https://fetch.spec.whatwg.org/#dom-headers-set
        set(name, value) {
          webidl.brandCheck(this, _Headers);