{
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  "source": "pragma solidity ^0.4.24;\n\nimport \"./Actions.sol\";\n\nlibrary Tables {\n    using Actions for Actions.Action;\n    using strings for *;\n\n    struct Column {\n        bool exists;\n        string id;\n        string type_;\n        string label;\n        Actions.Action action;\n    }\n\n    struct Table {\n        bool exists;\n        Column[] columns;\n        string[] rows;\n    }\n\n    function empty() internal pure returns (Table memory) {\n        return Table(false, new Column[](0), new string[](0));\n    }\n\n    function toJson(Table memory _self) internal pure returns (string) {\n        if (_self.exists) {\n            string memory json = '{\"columns\":[';\n            uint length = 0;\n            for (uint i = 0; i < _self.columns.length; i++) {\n                if (length > 0) {\n                    json = json.toSlice().concat(','.toSlice());\n                }\n                json = json.toSlice().concat(_columnToJson(_self.columns[i]).toSlice());\n                length += 1;\n            }\n            json = json.toSlice().concat('],\"rows\":['.toSlice());\n            length = 0;\n            for (i = 0; i < _self.rows.length; i++) {\n                if (length > 0) {\n                    json = json.toSlice().concat(','.toSlice());\n                }\n                json = json.toSlice().concat(_self.rows[i].toSlice());\n                length += 1;\n            }\n            return json.toSlice().concat(']}'.toSlice());\n        } else {\n            return \"null\";\n        }\n    }\n\n    function _columnToJson(Column memory _self) internal pure returns (string) {\n        if (_self.exists) {\n            string memory json = '{\"id\":\"';\n            json = json.toSlice().concat(_self.id.toSlice());\n            json = json.toSlice().concat('\"'.toSlice());\n            if (_self.action.exists) {\n                json = json.toSlice().concat(','.toSlice());\n                json = json.toSlice().concat('\"action\":'.toSlice());\n                json = json.toSlice().concat(_self.action.toJson().toSlice());\n            }\n            json = json.toSlice().concat(',\"type\":\"'.toSlice());\n            json = json.toSlice().concat(_self.type_.toSlice());\n            json = json.toSlice().concat('\",\"label\":\"'.toSlice());\n            json = json.toSlice().concat(_self.label.toSlice());\n            return json.toSlice().concat('\"}'.toSlice());\n        } else {\n            return \"null\";\n        }\n    }\n}\n",
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