Erro must take exactly 2 arguments - PHP/Wordpress/visual composer

Olá, estou tentando criar um componente personalizado para visual composer um dropdown, tenho o arquivo php pesquisa.php que cria o componente personalizado,  e tenho o arquivo Receita.php que retorna os dados para serem exibidos no componente, o problema é que quando executo a pagina não aparece o componente e nem os dados do arquivo Receita.php.

Pelo DEBUG do Wordpress apresenta a seguinte mensagem abaixo:

[03-Feb-2018 02:33:07 UTC] PHP Fatal error:  Method ImmutableValueObject::__set() must take exactly 2 arguments in /var/www/html/wp-content/themes/n2go-2014/visual-composer/elements/Receita.php on line 33

Por fim segue o conteúdo dos arquivos PHP mencionados :

Pesquisa.php

<?php
include 'Receita.php';

class Pesquisa extends WPBakeryShortCode
{

}

$atts = Integration::instance()->get_default_shortcode_attrs();
vc_map([

	'name' => __('N2Go Integrations', 'js_composer'),
	'base' => 'n2go_integrations',
	'icon' => 'icon-heart',
	'category' => [__('Content', 'js_composer')],
	'params' => array_map(

 function($key, $default){
 return [
 'type' => 'Dropdown',
 'heading' => ucwords(str_replace('_', ' ', $key)),
 'param_name' => $key,
 'value' => $default,
 ];
 },
 array_keys($att),
 $atts
	),
	'descrição' => 'alguma descrição',
]);

?>

	 

	Receita.php

<?php

/**
* Utility base class that makes it easier to fill in readonly value objects.
* @internal
*/
abstract class ImmutableValueObject
{

 protected $data = [];

 final public function __construct(array $properties = [])
 {
 $this->data = array_merge($this->data, $properties);
 }

 final public function __get($name)
 {
 if (!array_key_exists($name, $this->data)) {
 throw new RuntimeException(sprintf('Undefined property: %s::%s', __CLASS__, $name));
 }

 return $this->data[$name];
 }

 final public function __set($name)
 {
 throw new RuntimeException(sprintf(
 '%s property: %s::%s',
 array_key_exists($name, $this->data) ? 'Readonly' : 'Undefined',
 __CLASS__,
 $name
 ));
 }
}

/**
* @internal This is just a stub.
*
* @property string $id Unique ID of the integration
* @property string $name Full name of integration, eg; 'WordPress'
* @property string $abbreviation Short code of integration, eg; 'MAG' for Magento or 'WP' for WordPress
* @property string $imageUrl Logo of the integration, usually in SVG format
* @property string $helpUrl User guide URL - can be empty, in which case disable or hide help link
* @property string $type A value from: 'CRM', 'CMS' or 'Webshop'
* @property IntegrationSystem[] $items List of supported integrations (plugins or connectors bound to one system)
*/
class Integration extends ImmutableValueObject {}

/**
* @internal This is just a stub.
*
* @property string $id Unique ID of the integration system
* @property string $edition Eg; 'v4.2', 'v3 and older' or 'All Versions' - used in combination with integration
* @property int $position Used for ordering
* @property IntegrationPlugin[] $plugins List of plugins that support this edition.
* @property IntegrationConnector[] $connectors List of connectors that support this edition.
*/
class IntegrationSystem extends ImmutableValueObject {}

/**
* @internal This is just a stub.
*
* @property string $id Unique ID of the plugin
* @property string $version Eg; '4000' or '4.0.0.0' - if it is 4 chars and no dots, then it should be formatted with dots between each char.
* @property string $url Full URL for download the plugin. This may be a direct download or a page showcasing the plugin in a marketplace.
*/
class IntegrationPlugin extends ImmutableValueObject {}

/**
* @internal This is just a stub.
*
* @property string $id Unique ID of the connector
* @property string $version Eg; '4000' or '4.0.0.0' - if it is 4 chars and no dots, then it should be formatted with dots between each char.
*/
class IntegrationConnector extends ImmutableValueObject {}

/** @var Integration[] $sampleData */
$sampleData = [

 new Integration([
 'id' => '1',
 'name' => 'Amazon',
 'abbreviation' => 'AM',
 'imageUrl' => '//files-staging.newsletter2go.com/integration/amazon.svg',
 'helpUrl' => 'https://www.newsletter2go.de/features/amazon-newsletter-integration/',
 'type' => 'Webshop',
 'items' => [
 new IntegrationSystem([
 'id' => '1',
 'edition' => 'All Versions',
 'position' => 0,
 'plugins' => [],
 'connectors' => [
 new IntegrationConnector(['id' => '1', 'version' => '3000']),
 ],
 ])
 ]
 ]),
 new Integration([
 'id' => '2',
 'name' => 'Lightspeed eCom',
 'abbreviation' => 'LS',
 'imageUrl' => '//files-staging.newsletter2go.com/integration/lightspeed.svg',
 'helpUrl' => '',
 'type' => 'Webshop',
 'items' => [
 new IntegrationSystem([
 'id' => '2',
 'edition' => 'All Versions',
 'position' => 0,
 'plugins' => [],
 'connectors' => [
 new IntegrationConnector(['id' => '2', 'version' => '3000']),
 new IntegrationConnector(['id' => '3', 'version' => '3001']),
 new IntegrationConnector(['id' => '4', 'version' => '3002']),
 new IntegrationConnector(['id' => '5', 'version' => '3003']),
 ],
 ])
 ]
 ]),
 new Integration([
 'id' => '3',
 'name' => 'WordPress',
 'abbreviation' => 'WP',
 'imageUrl' => '//files-staging.newsletter2go.com/integration/wordpress.svg',
 'helpUrl' => 'https://www.newsletter2go.com/help/integration-api/set-up-wordpress-plug-in/',
 'type' => 'CMS',
 'items' => [
 new IntegrationSystem([
 'id' => '2',
 'edition' => 'All Versions',
 'position' => 0,
 'plugins' => [
 new IntegrationPlugin(['id' => '1', 'version' => '2100', 'url' => 'https://www.newsletter2go.de/plugins/wordpress/wp_v2_1_00.zip']),
 new IntegrationPlugin(['id' => '2', 'version' => '3000', 'url' => 'https://www.newsletter2go.de/plugins/wordpress/wp_v3_0_00.zip']),
 new IntegrationPlugin(['id' => '3', 'version' => '3003', 'url' => 'https://www.newsletter2go.de/plugins/wordpress/wp_v3_0_03.zip']),
 new IntegrationPlugin(['id' => '4', 'version' => '3005', 'url' => 'https://www.newsletter2go.de/plugins/wordpress/wp_v3_0_05.zip']),
 new IntegrationPlugin(['id' => '5', 'version' => '4006', 'url' => 'https://www.newsletter2go.de/plugins/wordpress/wp_latest.zip']),
 ],
 'connectors' => [
 new IntegrationConnector(['id' => '6', 'version' => '3000']),
 ],
 ])
 ]
 ]),
];

return $sampleData;