code: def enter_scope(self):
      self.scopes_.append({})
  
imports: import fontTools.voltLib.ast
  from fontTools.voltLib.lexer import Lexer
  from fontTools.voltLib.error import VoltLibError
  from io import open
label_desc: Use image node_id 2 for calling the SymbolTable obj's underlying member method code with example usage: obj.enter_scope() without return types