function noConflict() {
      if (root._ === this) {
        root._ = oldDash;
      }
      return this;
    }
Reverts the `_` variable to its previous value and returns a reference to
the `lodash` function.

@static
@since 0.1.0
@memberOf _
@category Util
@returns {Function} Returns the `lodash` function.
@example

var lodash = _.noConflict();