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This is a library for predictive scans. Its aim is to
improve user experience in cases when user interactions have to be
acknowledged by a remote host. It closes the gap between requesting
the interaction and the remote end acknowledging it by predicting
what the remote end will decide based on local information. If the
prediction is wrong, it automatically backtracks to the last state
known to be consistent.
Simple example: Your application displays a client-side text box,
but each edit made to it has to be acknowledged by a server.
However, most of the time the server will acknowledge, so your
application can use this library to proceed under this assumption
and only backtrack, if the server disagrees.
