code: def relation_sempred(self, localctx: RelationContext, predIndex: int):
      if predIndex == 0:
          return self.precpred(self._ctx, 2)
  
imports: from antlr4 import *
  from io import StringIO
  import sys
label_desc: Use image node_id 44 for calling the LaTeXParser obj's underlying member method code with example usage: obj.relation_sempred(localctx, predIndex) and returns: self