/usr/share/javascript/dojo/_base/ is in libjs-dojo-core 1.6.1+dfsg-1.
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..
/usr/share/javascript/dojo/_base/Color.js
/usr/share/javascript/dojo/_base/Deferred.js
/usr/share/javascript/dojo/_base/NodeList.js
/usr/share/javascript/dojo/_base/_loader/
/usr/share/javascript/dojo/_base/_loader/bootstrap.js
/usr/share/javascript/dojo/_base/_loader/hostenv_browser.js
/usr/share/javascript/dojo/_base/_loader/hostenv_ff_ext.js
/usr/share/javascript/dojo/_base/_loader/hostenv_rhino.js
/usr/share/javascript/dojo/_base/_loader/hostenv_spidermonkey.js
/usr/share/javascript/dojo/_base/_loader/loader.js
/usr/share/javascript/dojo/_base/_loader/loader_debug.js
/usr/share/javascript/dojo/_base/_loader/loader_xd.js
/usr/share/javascript/dojo/_base/array.js
/usr/share/javascript/dojo/_base/browser.js
/usr/share/javascript/dojo/_base/connect.js
/usr/share/javascript/dojo/_base/declare.js
/usr/share/javascript/dojo/_base/event.js
/usr/share/javascript/dojo/_base/fx.js
/usr/share/javascript/dojo/_base/html.js
/usr/share/javascript/dojo/_base/json.js
/usr/share/javascript/dojo/_base/lang.js
/usr/share/javascript/dojo/_base/query-sizzle.js
/usr/share/javascript/dojo/_base/query.js
/usr/share/javascript/dojo/_base/window.js
/usr/share/javascript/dojo/_base/xhr.js