void deletePackage() {
DataTable packages = DataTable.create();
packages.addColumn(DataTable.ColumnType.NUMBER, "id");
packages.addColumn(DataTable.ColumnType.NUMBER, "from");
packages.addColumn(DataTable.ColumnType.NUMBER, "to");
packages.addColumn(DataTable.ColumnType.STRING, "action");
packages.addRow();
int i = 0;
packages.setValue(i, 0, packageId);
packages.setValue(i, 3, "delete");