class_docstr: This base class defines abstract methods for manipulating a State.
  
  Applying transitions may change important metadata about a State
  such as the vectors associated with LSTM hidden states, for example.
  
  The constructor forwards all unused arguments to other classes in the
  constructor sequence, so put this before other classes such as nn.Module
class_docstr_tok: ["This","base","class","defines","abstract","methods","for","manipulating","a","State",".","Applying","transitions","may","change","important","metadata","about","a","State","such","as","the","vectors","associated","with","LSTM","hidden","states",",","for","example",".","The","constructor","forwards","all","unused","arguments","to","other","classes","in","the","constructor","sequence",",","so","put","this","before","other","classes","such","as","nn.Module"]
docstr: Builds an initial transition stack with whatever values need to go into first position
docstr_tok: ["Builds","an","initial","transition","stack","with","whatever","values","need","to","go","into","first","position"]
code: def initial_transitions(self):
      """
      Builds an initial transition stack with whatever values need to go into first position
      """
  
imports: from abc import ABC, abstractmethod
  from collections import defaultdict
  import logging
  import torch
  from stanza.models.common import utils
  from stanza.models.constituency import parse_transitions
  from stanza.models.constituency import transition_sequence
  from stanza.models.constituency.parse_transitions import State, TransitionScheme, CloseConstituent
  from stanza.models.constituency.parse_tree import Tree
  from stanza.models.constituency.tree_stack import TreeStack
  from stanza.server.parser_eval import ParseResult, ScoredTree
label_desc: Use image node_id 3 for calling the BaseModel obj's underlying member method code with example usage: obj.initial_transitions() without return types