That's it. Any other response is either a variation of these (like "resize the buffer," which is really just deferring the choice) or domain-specific logic that doesn't belong in a general streaming primitive. Web streams currently always choose Wait by default.
Border Points: Each cluster has a limited number of defined "border points" – these are the gateways in and out of the cluster.
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Mr Lemmens said that future spacecraft "should be designed in such a way that they can take themselves out of orbit safely, preferably by doing controlled re-entries".
Also: I compared two of the best Android camera phones right now - there's a surprise winner