public List<ColumnMetadata> getColumnsMetadata()
    {
        return columnsMetadata;
    }
@Test
    public void testColumnMetadata()
    {
        assertEquals(exampleTable.getColumnsMetadata(), ImmutableList.of(
                new ColumnMetadata("a", createUnboundedVarcharType()),
                new ColumnMetadata("b", BIGINT)));
    }