Type Alias Streaming 

pub type Streaming<T> = Pin<Box<dyn Stream<Item = Result<T, RpcError>> + Send>>;

Type alias for streaming RPC results.

Service traits should use this in their return types:

async fn range(&self, n: u32) -> Streaming<u32>;

The outer async fn gives you the stream, and each item of the stream is a Result<T, RpcError> representing either a value or an error.

Aliased Type

pub struct Streaming<T> { /* private fields */ }