Csv { public static DataFrame load(File file) { return loader().load(file); }  static DataFrame load(File file); static DataFrame load(String filePath); static DataFrame load(Reader reader); static CsvLoader loader(); static void save(DataFrame df, String filePath); static void save(DataFrame df, File file); static void save(DataFrame df, Appendable out); static CsvSaver saver();  }
@Test public void testFromFile() { DataFrame df = Csv.load(inPath("f1.csv")); new DataFrameAsserts(df, "A", "b", "C") .expectHeight(2) .expectRow(0, "1", "2", "3") .expectRow(1, "4", "5", "6"); }