SourceRef

```
public interface SourceRef<T>
```
A SourceRef allows sharing a "reference" with others, with the main purpose of crossing a network boundary. Usually obtaining a SourceRef would be done via Actor messaging, in which one system asks a remote one, to share some data with it, and the remote one decides to do so in a back-pressured streaming fashion -- using a stream ref.
To create a SourceRef you have to materialize the Source that you want to obtain a reference to by attaching it to a Sink.sourceRef.
Stream refs can be seen as Reactive Streams over network boundaries. See also SinkRef which is the dual of a SourceRef.
For additional configuration see reference.conf as well as StreamRefAttributes.
Not for user extension.

Method Summary

All Methods Instance Methods Abstract Methods
Modifier and Type	Method	Description
`Source<T,NotUsed>`	`getSource()`	Java API: Get `javadsl.Source` underlying to this source ref.
`Source<T,NotUsed>`	`source()`	Scala API: Get `Source` underlying to this source ref.

- Method Detail
  - source
```
Source<T,NotUsed> source()
```
    Scala API: Get Source underlying to this source ref.
  - getSource
```
Source<T,NotUsed> getSource()
```
    Java API: Get javadsl.Source underlying to this source ref.