function chain(value) {
    value = new LoDash(value);
    value.__chain__ = true;
    return value;
  }
Wraps the value in a `lodash` wrapper object.

@static
@memberOf _
@category Chaining
@param {Mixed} value The value to wrap.
@returns {Object} Returns the wrapper object.
@example

var stooges = [
  { 'name': 'moe', 'age': 40 },
  { 'name': 'larry', 'age': 50 },
  { 'name': 'curly', 'age': 60 }
];

var youngest = _.chain(stooges)
    .sortBy(function(stooge) { return stooge.age; })
    .map(function(stooge) { return stooge.name + ' is ' + stooge.age; })
    .first()
    .value();
// => 'moe is 40'