@Override
                        public String getRemoteAddress() {
                            // Rely on GRPC's capabilities, not magic (netty channel)
                            return remoteAddress != null ? remoteAddress.toString() : null;
                        }
GRPC RPC server implement.

@author nicholas.jxf
@author jiachun.fjc
jraft-extension/rpc-grpc-impl/src/main/java/com/alipay/sofa/jraft/rpc/impl/GrpcServer.java