public com.alipay.sofa.jraft.rpc.RpcRequests.ErrorResponse getErrorResponse() {
                if (errorResponseBuilder_ == null) {
                    return errorResponse_ == null ? com.alipay.sofa.jraft.rpc.RpcRequests.ErrorResponse
                        .getDefaultInstance() : errorResponse_;
                } else {
                    return errorResponseBuilder_.getMessage();
                }
            }
<code>optional .jraft.ErrorResponse errorResponse = 99;</code>
jraft-core/src/main/java/com/alipay/sofa/jraft/rpc/CliRequests.java