Replaceing Backbone sync on an Application level -- not via Model or Xollection

Replaceing Backbone sync on an Application level -- not via Model or
Xollection

How does one replace Backbone.sync using backbone.basicauth library found
here.
Can that be done on an Application level -- on App.init in main.js for
example -- and avoid overriding the "synch" on every Model or Collection
project
source