code: def test_empty_to_pandas(self):
      table = self.t_env.from_pandas(self.pdf, self.data_type)
      pdf = table.filter(table.f1 < 0).to_pandas()
      self.assertTrue(pdf.empty)
  
imports: import datetime
  import decimal
  from pandas.testing import assert_frame_equal
  from pyflink.common import Row
  from pyflink.table.types import DataTypes
  from pyflink.testing import source_sink_utils
  from pyflink.testing.test_case_utils import PyFlinkBatchTableTestCase, PyFlinkStreamTableTestCase
label_desc: Use image node_id 3 for calling the PandasConversionITTests obj's underlying member method code with example usage: obj.test_empty_to_pandas() without return types