Aspect - Dojo 1.8.3

aspect.js

require([
  'dojo/aspect'
], function (
  aspect
) {

    var a = {
        foo: function (param) {
          console.log(param);
        }
    };

    aspect.after(a, 'foo', function (method, args) {
      console.log('first');
    });

    aspect.after(a, 'foo', function (method, args) {
      console.log('second');
    });

    a.foo(1);
});