public void addChild(int index, MetadataTreeNode kid) {
        if (kid == null) {
            return;
        }

        if (children == null) {
            children = new MetadataTreeNode[nChildren];
        }

        children[index % nChildren] = kid;
    }

    // ------------------------------------------------------------------
    @Override

	}

	keyFuncCallback := func(jwtToken *jwtgo.Token) (any, error) {
		kid, ok := jwtToken.Header["kid"].(string)
		if !ok {
			return nil, fmt.Errorf("Invalid kid value %v", jwtToken.Header["kid"])
		}
		pubkey := r.pubKeys.get(kid)
		if pubkey == nil {
			return nil, fmt.Errorf("No public key found for kid %s", kid)
		}
		return pubkey, nil
	}

	pCfg, ok := r.arnProviderCfgsMap[arn]
	if !ok {

          "e":"AQAB",
          "alg":"RS256",
          "kid":"2011-04-29"}
       ]
     }`
		w.Write([]byte(jsonkey))
	}))
	return server
}

func TestJWTHMACType(t *testing.T) {
	server := initJWKSServer()
	defer server.Close()

	jwt := &jwtgo.Token{