Limpar log via dataset - Windows

function createDataset(fields, constraints, sortFields) {
    var dataset = DatasetBuilder.newDataset();
    dataset.addColumn("retorno");

    var retorno = new java.nio.file.Path.of("F:\\fluig\\appserver\\domain\\servers\\fluig1\\log\\server.log");
    var retorno3 = new java.nio.file.Files.writeString(retorno, "");

    log.debug(retorno3);

    dataset.addRow([retorno3]);

    return dataset;
}