code: function serializeAllDates(model, json) {
  	_.each(json, function (value, name) {
  		if ( _.isDate( value ) ) {
  			json[ name ] = model.serializeDate( name, value );
  		} else if ( !isScalar( value ) && !isBackboneInstance( value ) && isRecursive( value ) ) {
  			serializeAllDates( model, value );
  		}
  	});
  
  	return json;
  }
docs: Recursively serializes all `Date` values in an object.
  
  @param {Backbone.DynamoDB.Model} model
  @param {Object} json