Add folly::Optional<T> UnboundedQueue::try_dequeue() method
Add folly::Optional<T> UnboundedQueue::try_dequeue() method

Summary: Add folly::Optional<T> UnboundedQueue::try_dequeue() method

Reviewed By: magedm

Differential Revision: D7164049

fbshipit-source-id: 659de2d26067bb1a5bdea50f4cd7711e6955ba61

rklabs/folly,rklabs/folly,facebook/folly,facebook/folly,facebook/folly,rklabs/folly,rklabs/folly,facebook/folly,facebook/folly,rklabs/folly