code: def test_valid_actions_constraint_unsupported(self):
      self.parser.constraints_intent_slot_nesting = True
      self.parser.constraints_no_slots_inside_unsupported = True
      state = self.populate_buffer()
  
      # Valid Actions at beginning: all intents
      self.check_valid_actions(state, self.parser.valid_IN_idxs)
  
      # Needed to make test logic work
      state.predicted_actions_idx.append(
          self.parser.actions_vocab.stoi["IN:UNSUPPORTED"]
      )
      # After pushing IN:UNSUPPORTED: SHIFT
      self.parser.push_action(
          state, self.parser.actions_vocab.stoi["IN:UNSUPPORTED"]
      )
      self.check_valid_actions(state, [self.parser.shift_idx])
  
imports: import unittest
  from collections import Counter
  import torch
  import torch.nn
  from pytext.common.constants import Stage
  from pytext.config.module_config import PoolingType
  from pytext.legacy.vocab import Vocab
  from pytext.models.embeddings import DictEmbedding, EmbeddingList, WordEmbedding
  from pytext.models.semantic_parsers.rnng.rnng_data_structures import CompositionalNN, CompositionalSummationNN, Element, ParserState, StackLSTM
  from pytext.models.semantic_parsers.rnng.rnng_parser import RNNGParser
label_desc: Use image node_id 6 for calling the RNNGParserTest obj's underlying member method code with example usage: obj.test_valid_actions_constraint_unsupported() without return types