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Matthew Waters authored
An object that can be waited on and asked for asynchronous values. In much the same way as promise/futures in js/java/etc A callback can be installed for when the promise changes state. Original idea by Jan Schmidt <jan@centricular.com> With contributions from Nirbheek Chauhan <nirbheek@centricular.com> Mathieu Duponchelle <mathieu@centricular.com> https://bugzilla.gnome.org/show_bug.cgi?id=789843
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