public final H2AsyncClientBuilder setIOReactorConfig(final IOReactorConfig ioReactorConfig) {
        this.ioReactorConfig = ioReactorConfig;
        return this;
    }
Sets {@link IOReactorConfig} configuration.

@return this instance.
httpclient5/src/main/java/org/apache/hc/client5/http/impl/async/H2AsyncClientBuilder.java