JSONObject header = sheetJSON.optJSONObject(WorkSheetSerializationCostants.HEADER);
JSONObject filters = sheetJSON.optJSONObject(WorkSheetSerializationCostants.FILTERS);
String layout = sheetJSON.optString(WorkSheetSerializationCostants.LAYOUT);
JSONObject content = sheetJSON.optJSONObject(WorkSheetSerializationCostants.CONTENT);
JSONObject footer = sheetJSON.optJSONObject(WorkSheetSerializationCostants.FOOTER);
return new WorkSheet(name, layout, header, filters, content, footer);
}