code: def sempred(
      self, localctx: RuleContext, ruleIndex: int, predIndex: int
  ):
      if self._predicates == None:
          self._predicates = dict()
      self._predicates[27] = self.expr_sempred
      pred = self._predicates.get(ruleIndex, None)
      if pred is None:
          raise Exception("No predicate with index:" + str(ruleIndex))
      else:
          return pred(localctx, predIndex)
  
imports: from antlr4 import *
  from io import StringIO
  import sys
label_desc: Use image node_id 30 for calling the AutolevParser obj's underlying member method code with example usage: obj.sempred(localctx, ruleIndex, predIndex) and returns: pred