class_docstr: Tests whether the Python :module:`pyflink.table.expressions` is consistent with
  Java `org.apache.flink.table.api.Expressions`.
code: def java_class(cls):
      return "org.apache.flink.table.api.Expressions"
  
file_path: flink/flink-python/pyflink/table/tests/test_expressions_completeness.py
imports: from pyflink.testing.test_case_utils import PythonAPICompletenessTestCase, PyFlinkTestCase
  from pyflink.table import expressions
label_desc: Use image node_id 2 for calling the ExpressionsCompletenessTests obj's underlying member method code with example usage: obj.java_class(cls) and returns: str