public boolean isKeyColumn(final ColumnName columnName) {
    return findColumnMatching(withNamespace(Namespace.KEY).and(withName(columnName)))
        .isPresent();
  }
@Test
  public void shouldMatchMetaColumnName() {
    assertThat(SystemColumns.isPseudoColumn(ROWTIME_NAME), is(true));
    assertThat(SOME_SCHEMA.isKeyColumn(ROWTIME_NAME), is(false));
  }