code: def test_order_by_empty_table(self):
      table = Table([], self.column_names)
      table.order_by("three")
  
file_path: agate/tests/test_table/test_order_py.py
imports: from agate import Table
  from agate.data_types import Number, Text
  from agate.testcase import AgateTestCase
label_desc: Use image node_id 8 for calling the TestOrderBy obj's underlying member method code with example usage: obj.test_order_by_empty_table() without return types