code: def mathit_text(self):
      localctx = LaTeXParser.Mathit_textContext(
          self, self._ctx, self.state
      )
      self.enterRule(localctx, 52, self.RULE_mathit_text)
      self._la = 0  # Token type
      try:
          self.enterOuterAlt(localctx, 1)
          self.state = 335
          self._errHandler.sync(self)
          _la = self._input.LA(1)
          while _la == 77:
              self.state = 332
              self.match(LaTeXParser.LETTER)
              self.state = 337
              self._errHandler.sync(self)
              _la = self._input.LA(1)
  
      except RecognitionException as re:
          localctx.exception = re
          self._errHandler.reportError(self, re)
          self._errHandler.recover(self, re)
      finally:
          self.exitRule()
      return localctx
  
imports: from antlr4 import *
  from io import StringIO
  import sys
label_desc: Use image node_id 28 for calling the LaTeXParser obj's underlying member method code with example usage: obj.mathit_text() and returns: localctx