@Deprecated
    public final HttpAsyncClientBuilder setVersionPolicy(final HttpVersionPolicy versionPolicy) {
        this.tlsConfig = versionPolicy != null ? TlsConfig.custom().setVersionPolicy(versionPolicy).build() : null;
        return this;
    }
Sets HTTP protocol version policy.

@return this instance.
@deprecated Use {@link TlsConfig} and connection manager methods
httpclient5/src/main/java/org/apache/hc/client5/http/impl/async/HttpAsyncClientBuilder.java