Materializes the stream, including all components linked (transitively) to this one, and starts running it.
Materializes the stream, including all components linked (transitively) to this one, and starts running it.
The same result is produced no matter which stream component is used to call build
.
This method may only be called once per stream (see README on the subject of reusing components).
Common marker trait of stream components: Source, Sink, Transform, etc.
NOTE: the trait constructor registers this instance with the StreamBuilder returned by
builder
!