var _ = require('lodash');
_.mixin(require('a.b'));

var obj = {
  foo: {
    bar: {
      x: {
        3.14
      }
    }
  }
};

var x = _(obj).dot('foo.bar.x');  // x = 3.14
var y = _(obj).dot('foo.bar.y');  // y = undefined
var z = _(obj).dot('a.b.c.z');    // z = undefined