code: def validate_literals(self):
      try:
          for c in self.literals:
              if not isinstance(c, StringTypes) or len(c) > 1:
                  self.log.error(
                      "Invalid literal %s. Must be a single character",
                      repr(c),
                  )
                  self.error = True
  
      except TypeError:
          self.log.error(
              "Invalid literals specification. literals must be a sequence of characters"
          )
          self.error = True
  
imports: import re
  import sys
  import types
  import copy
  import os
  import inspect
label_desc: Use image node_id 7 for calling the LexerReflect obj's underlying member method code with example usage: obj.validate_literals() without return types