*
 * @param <Req> the type of the request
 * @param <Res> the type of the response
 */
public abstract class RequestBuilder<Req extends Request<Res>, Res extends Response> {
    /** The OpenSearch client. */
    protected Client client;
    /** The request being built. */
    protected Req request;

    /**
     * Constructor for RequestBuilder.

				"application/vnd.ms-project",
				"application/x-project",
				"application/vnd.ms-tnef",
				"application/vnd.ms-wmdrm.lic-chlg-req",
				"application/vnd.ms-wmdrm.lic-resp",
				"application/vnd.ms-wmdrm.meter-chlg-req",
				"application/vnd.ms-wmdrm.meter-resp",
				"application/vnd.ms-word.document.macroenabled.12",
				"application/vnd.ms-word.template.macroenabled.12",

      <match value="0x223e9f78" type="little32" offset="0" />
    </magic>
  </mime-type>

  <mime-type type="application/vnd.ms-wmdrm.lic-chlg-req"/>
  <mime-type type="application/vnd.ms-wmdrm.lic-resp"/>
  <mime-type type="application/vnd.ms-wmdrm.meter-chlg-req"/>
  <mime-type type="application/vnd.ms-wmdrm.meter-resp"/>

  <mime-type type="application/vnd.ms-word.document.macroenabled.12">