public ColumnMeta getColumnMeta(String colName) {
        return allColumns.get(colName);
    }
@Test
    public void testGetColumnMeta() {
        ColumnMeta columnMeta = new ColumnMeta();
        tableMeta.getAllColumns().put("col1", columnMeta);

        assertEquals(columnMeta, tableMeta.getColumnMeta("col1"), "Should return the correct ColumnMeta object");
    }