public static FixedBuilder<Schema> fixed(String name) {
    return builder().fixed(name);
  }
@Test
  void fixed() {
    Schema expected = Schema.createFixed("myfixed", null, null, 16);
    expected.addAlias("myOldFixed");
    Schema schema = SchemaBuilder.fixed("myfixed").aliases("myOldFixed").size(16);
    assertEquals(expected, schema);
  }