httpclient5/src/main/java/org/apache/hc/client5/http/impl/async/H2AsyncClientBuilder.java [797:830]:
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                ChainElement.MAIN_TRANSPORT.name());

        execChainDefinition.addFirst(
                new AsyncConnectExec(
                        new DefaultHttpProcessor(new RequestTargetHost(), new RequestUserAgent(userAgentCopy)),
                        proxyAuthStrategyCopy,
                        schemePortResolver != null ? schemePortResolver : DefaultSchemePortResolver.INSTANCE,
                        authCachingDisabled),
                ChainElement.CONNECT.name());

        execChainDefinition.addFirst(
                new AsyncProtocolExec(
                        targetAuthStrategyCopy,
                        proxyAuthStrategyCopy,
                        schemePortResolver != null ? schemePortResolver : DefaultSchemePortResolver.INSTANCE,
                        authCachingDisabled),
                ChainElement.PROTOCOL.name());

        // Add request retry executor, if not disabled
        if (!automaticRetriesDisabled) {
            HttpRequestRetryStrategy retryStrategyCopy = this.retryStrategy;
            if (retryStrategyCopy == null) {
                retryStrategyCopy = DefaultHttpRequestRetryStrategy.INSTANCE;
            }
            execChainDefinition.addFirst(
                    new AsyncHttpRequestRetryExec(retryStrategyCopy),
                    ChainElement.RETRY.name());
        }

        HttpRoutePlanner routePlannerCopy = this.routePlanner;
        if (routePlannerCopy == null) {
            SchemePortResolver schemePortResolverCopy = this.schemePortResolver;
            if (schemePortResolverCopy == null) {
                schemePortResolverCopy = DefaultSchemePortResolver.INSTANCE;
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httpclient5/src/main/java/org/apache/hc/client5/http/impl/async/HttpAsyncClientBuilder.java [975:1008]:
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                ChainElement.MAIN_TRANSPORT.name());

        execChainDefinition.addFirst(
                new AsyncConnectExec(
                        new DefaultHttpProcessor(new RequestTargetHost(), new RequestUserAgent(userAgentCopy)),
                        proxyAuthStrategyCopy,
                        schemePortResolver != null ? schemePortResolver : DefaultSchemePortResolver.INSTANCE,
                        authCachingDisabled),
                ChainElement.CONNECT.name());

        execChainDefinition.addFirst(
                new AsyncProtocolExec(
                        targetAuthStrategyCopy,
                        proxyAuthStrategyCopy,
                        schemePortResolver != null ? schemePortResolver : DefaultSchemePortResolver.INSTANCE,
                        authCachingDisabled),
                ChainElement.PROTOCOL.name());

        // Add request retry executor, if not disabled
        if (!automaticRetriesDisabled) {
            HttpRequestRetryStrategy retryStrategyCopy = this.retryStrategy;
            if (retryStrategyCopy == null) {
                retryStrategyCopy = DefaultHttpRequestRetryStrategy.INSTANCE;
            }
            execChainDefinition.addFirst(
                    new AsyncHttpRequestRetryExec(retryStrategyCopy),
                    ChainElement.RETRY.name());
        }

        HttpRoutePlanner routePlannerCopy = this.routePlanner;
        if (routePlannerCopy == null) {
            SchemePortResolver schemePortResolverCopy = this.schemePortResolver;
            if (schemePortResolverCopy == null) {
                schemePortResolverCopy = DefaultSchemePortResolver.INSTANCE;
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