code: def test_get_max_state_size(self):
      state_backend = MemoryStateBackend()
  
      self.assertEqual(
          state_backend.get_max_state_size(),
          MemoryStateBackend.DEFAULT_MAX_STATE_SIZE,
      )
  
      state_backend = MemoryStateBackend(max_state_size=50000)
  
      self.assertEqual(state_backend.get_max_state_size(), 50000)
  
imports: from pyflink.datastream.state_backend import _from_j_state_backend, CustomStateBackend, MemoryStateBackend, FsStateBackend, RocksDBStateBackend, PredefinedOptions, EmbeddedRocksDBStateBackend
  from pyflink.java_gateway import get_gateway
  from pyflink.pyflink_gateway_server import on_windows
  from pyflink.testing.test_case_utils import PyFlinkTestCase
  from pyflink.util.java_utils import load_java_class
label_desc: Use image node_id 3 for calling the MemoryStateBackendTests obj's underlying member method code with example usage: obj.test_get_max_state_size() without return types