public Builder mergeErrorResponse(com.alipay.sofa.jraft.rpc.RpcRequests.ErrorResponse value) {
                if (errorResponseBuilder_ == null) {
                    if (((bitField0_ & 0x00000008) == 0x00000008) && errorResponse_ != null
                        && errorResponse_ != com.alipay.sofa.jraft.rpc.RpcRequests.ErrorResponse.getDefaultInstance()) {
                        errorResponse_ = com.alipay.sofa.jraft.rpc.RpcRequests.ErrorResponse.newBuilder(errorResponse_)
                            .mergeFrom(value).buildPartial();
                    } else {
                        errorResponse_ = value;
                    }
                    onChanged();
                } else {
                    errorResponseBuilder_.mergeFrom(value);
                }
                bitField0_ |= 0x00000008;
                return this;
            }
<code>optional .jraft.ErrorResponse errorResponse = 99;</code>
jraft-core/src/main/java/com/alipay/sofa/jraft/rpc/RpcRequests.java