public int getColumnSize() {
    return columnSize;
  }
@Test
  public void build_string_column_def_with_only_required_attributes() {
    VarcharColumnDef def = new VarcharColumnDef.Builder()
      .setColumnName("issues")
      .setLimit(10)
      .build();

    assertThat(def.getName()).isEqualTo("issues");
    assertThat(def.getColumnSize()).isEqualTo(10);
    assertThat(def.isNullable()).isTrue();
    assertThat(def.getDefaultValue()).isNull();
  }