public final PoolingHttpClientConnectionManagerBuilder setDefaultSocketConfig(final SocketConfig config) {
        this.socketConfigResolver = route -> config;
        return this;
    }
Sets the same {@link SocketConfig} for all routes.

@return this instance.
httpclient5/src/main/java/org/apache/hc/client5/http/impl/io/PoolingHttpClientConnectionManagerBuilder.java