function wrapperChain() {
        return chain(this);
      }
Creates a `lodash` wrapper instance with explicit method chain sequences enabled.

@name chain
@memberOf _
@since 0.1.0
@category Seq
@returns {Object} Returns the new `lodash` wrapper instance.
@example

var users = [
  { 'user': 'barney', 'age': 36 },
  { 'user': 'fred',   'age': 40 }
];

// A sequence without explicit chaining.
_(users).head();
// => { 'user': 'barney', 'age': 36 }

// A sequence with explicit chaining.
_(users)
  .chain()
  .head()
  .pick('user')
  .value();
// => { 'user': 'barney' }