if(!dojo._hasResource["dijit.dijit"]){ //_hasResource checks added by build. Do not use _hasResource directly in your code.
dojo._hasResource["dijit.dijit"] = true;
dojo.provide("dijit.dijit");

// All the stuff in _base (these are the function that are guaranteed available without an explicit dojo.require)
dojo.require("dijit._base");

// And some other stuff that we tend to pull in all the time anyway
dojo.require("dojo.parser");
dojo.require("dijit._Widget");
dojo.require("dijit._Templated");
dojo.require("dijit._Container");
dojo.require("dijit.layout._LayoutWidget");
dojo.require("dijit.form._FormWidget");

}