el">CreateMessageReactionReq.</span><code><span class="memberNameLink"><a href="../../../../../../../../com/lark/oapi/service/im/v1/model/CreateMessageReactionReq.html#setCreateMessageReactionReqBody-com.lark.oapi.service.im.v1.model.CreateMessageReactionReqBody-">setCreateMessageReactionReqBody</a></span>(<a href="../../../../../../../../com/lark/oapi/service/im/v1/model/CreateMessageReactionReqBody.html" title="com.lark.oapi.service.im.v1.model中的类">CreateMessageReactionReqBody</a>&nbsp;body)</code>&