title: How to use scalar type as function argument in gRPC?
body: <p>In gRPC, it expects the argument to be a protobuf message.
  Suppose I want to send an int, I have to create a message <code>message Int { int32 value = 1; }</code> and use this message to send an int.</p>
  
  <p>Here is an example of the function definition: <code>rpc Range(Int) returns (stream Int) {}</code></p>
  
  <p>But I don't want to be creating a message structure like this for every default scalar type e.g. bool, int32, int64, float, etc.
  How do I use a scalar type in gRPC function argument?</p>