[

            { 
                "id" : "part_1",
                "title" : "Treść ustawy",
                "type": "part",
                "symbol" : "part_1",
                "children" : [
                    {"id": "arti_1","symbol": "arti_1","type": "arti","name": "1","title": "Art. 1.","children": [{"id": "arti_1-pint_1","symbol": "pint_1","type": "pint","name": "1","title": "1)","children": [{"id": "arti_1-pint_1-lett_a","symbol": "lett_a","type": "lett","name": "a","title": "a)"},{"id": "arti_1-pint_1-lett_b","symbol": "lett_b","type": "lett","name": "b","title": "b)"}]},{"id": "arti_1-pint_2","symbol": "pint_2","type": "pint","name": "2","title": "2)"}]},{"id": "arti_2","symbol": "arti_2","type": "arti","name": "2","title": "Art. 2.","children": [{"id": "arti_2-pass_1","symbol": "pass_1","type": "pass","name": "1","title": "1."},{"id": "arti_2-pass_2","symbol": "pass_2","type": "pass","name": "2","title": "2."},{"id": "arti_2-pass_3","symbol": "pass_3","type": "pass","name": "3","title": "3."}]},{"id": "arti_3","symbol": "arti_3","type": "arti","name": "3","title": "Art. 3."}
                ]
            }
        ]