Stream.fromQueue* could take a QueueSource instead of a Queue

[arosien]

I believe the signatures for Stream.fromQueueUnterminated, etc., could be narrowed to take QueueSource instead of Queue, because they only rely on the take and tryTake methods. Then if users want to translate a Queue to a Stream they don't have to require knowledge of the "write" methods of the Queue, only the "read" methods.

[kubukoz]

Agreed. I don't know if this will be a binary compatible change, though - if not, we can probably work around by making the existing functions package-private and adding new ones.

[djspiewak]

Should be binary compatible since it's a contravariant parameter adjustment.

[armanbilge]

Should be binary compatible since it's a contravariant parameter adjustment

I thought this too! But, MiMa didn't agree, I'd be really really interested to hear an explanation for why.

[mpilquist]

@djspiewak These are static methods, not class methods.

[armanbilge]

fromQueue is static, but the enqueue methods I also modified in my PR are class methods.