@Override
            public void completed(final AsyncConnectionEndpoint endpoint) {
                if (callback != null) {
                    callback.completed(InternalHttpAsyncExecRuntime.this);
                }
            }
@deprecated TLS should be configured by the connection manager
httpclient5/src/main/java/org/apache/hc/client5/http/impl/async/InternalHttpAsyncExecRuntime.java