code: def test_merge_with_row_names(self):
      table_a = Table(
          self.rows,
          self.column_names,
          self.column_types,
          row_names="three",
      )
  
      b_rows = ((1, 4, "d"), (2, 3, "e"), (None, 2, "f"))
  
      table_b = Table(
          b_rows,
          self.column_names,
          self.column_types,
          row_names="three",
      )
      table_c = Table.merge([table_a, table_b], row_names="three")
  
      self.assertRowNames(table_c, ["a", "b", "c", "d", "e", "f"])
  
file_path: agate/tests/test_table/test_merge.py
imports: from agate import Table
  from agate.data_types import Number, Text
  from agate.exceptions import DataTypeError
  from agate.testcase import AgateTestCase
label_desc: Use image node_id 6 for calling the TestMerge obj's underlying member method code with example usage: obj.test_merge_with_row_names() without return types