$prods = [
            'product' => [
                'RelatedProduct' => [
                    'id', 'title',
                    ['Specifications' => [
                        [
                            'id','title:Storage','position:3',
                            ['values' =>
                                [
                                    'id','value:32GB','position:2',
                                ]
                            ]
                        ],
                        [
                            'id','title:Display','position:1',
                            ['values' =>
                                [
                                    'id','value:IPS','position:3',
                                ]
                            ]
                        ]
                    ]]
                ]
            ],
            'product 2' => [
                'RelatedProduct' => [
                    'id', 'title',
                    ['Specifications' => [
                        [
                            'id','title:Storage','position:3',
                            ['values' =>
                                [
                                    'id','value:16GB','position:1',
                                ]
                            ]
                        ],
                        [
                            'id','title:Display','position:1',
                                ['values' =>
                                    [
                                    'id','value:OLDE','position:1',
                                    ]
                                ]
                        ]
                        ]]
                ]
            ],
            'product 3' => [
                'RelatedProduct' => [
                    'id', 'title',
                    ['Specifications' => [
                        [
                            'id','title:Storage','position:3',
                                ['values' =>
                                    [
                                    'id','value:32GB','position:2',
                                    ]
                                ]
                        ],
                        [
                            'id','title:Display','position:1',
                            ['values' =>
                                [
                                    'id','value:IPS','position:3',
                                ]
                            ]
                        ]
                        ]]
                ]
            ],
        ];