whole_func_string: function two(context, next) {
    setTimeout(function() {
      context.two = 'Hello';
      console.log('Hello from two', context);
      chain({ nested: 'Hello' }, [ one, three ]);
      return next();
    }, 1000);
  }
func_code_string: function two(context, next) {
    setTimeout(function() {
      context.two = 'Hello';
      console.log('Hello from two', context);
      chain({ nested: 'Hello' }, [ one, three ]);
      return next();
    }, 1000);
  }
func_documentation_string: Function Two.
  Example function, logs 'hello' and currect context.
  Calls a new nested chain.
  
  @param {Object} context Current context object.
  @param {Function} next Next middleware in chain.