NewGrpcClient creates new GrpcClient.

NewGrpcClientWithInsecure creates new GrpcClient with insecure credentials option enabled.

PushOutMeta pushes value with a key into outgoing grpc context metadata.

ErrCloseConn is an errors when a grpc connection wasn't be properly closed.

ErrCreateClient is an error when failed to establish a connection from grpc client to server.

Config holds grpc client configuration.

GrpcClient holds available methods of grpc client.