class_docstr: This class is used to parse a Python file, it then divides them into a
  class structure of different scopes.
  
  :param pgen_grammar: The grammar object of pgen2. Loaded by load_grammar.
class_docstr_tok: ["This","class","is","used","to","parse","a","Python","file",",","it","then","divides","them","into","a","class","structure","of","different","scopes",".",":","param","pgen_grammar",":","The","grammar","object","of","pgen2",".","Loaded","by","load_grammar","."]
code: def _stack_removal(self, start_index):
      all_nodes = [
          node
          for stack_node in self.stack[start_index:]
          for node in stack_node.nodes
      ]
  
      if all_nodes:
          node = tree.PythonErrorNode(all_nodes)
          self.stack[start_index - 1].nodes.append(node)
  
      self.stack[start_index:] = []
      return bool(all_nodes)
  
file_path: catboost/contrib/python/parso/py3/parso/python/parser.py
imports: from parso.python import tree
  from parso.python.token import PythonTokenTypes
  from parso.parser import BaseParser
label_desc: Use image node_id 6 for calling the Parser obj's underlying member method code with example usage: obj._stack_removal(start_index) and returns: bool