code: def test_get_field_count(self):
      schema = TableSchema(
          ["a", "b", "c"],
          [DataTypes.INT(), DataTypes.BIGINT(), DataTypes.STRING()],
      )
  
      count = schema.get_field_count()
  
      self.assertEqual(3, count)
  
file_path: flink/flink-python/pyflink/table/tests/test_table_schema.py
imports: from pyflink.table.types import DataTypes
  from pyflink.table.table_schema import TableSchema
  from pyflink.testing.test_case_utils import PyFlinkTestCase
label_desc: Use image node_id 5 for calling the TableSchemaTests obj's underlying member method code with example usage: obj.test_get_field_count() without return types