public int getScale() {
    return scale;
  }
@Test
  public void default_precision_is_20() {
    DecimalColumnDef def = new DecimalColumnDef.Builder()
      .setColumnName("issues")
      .setPrecision(30)
      .setIsNullable(true)
      .build();

    assertThat(def.getScale()).isEqualTo(20);
  }