code: public final void mT__20() throws RecognitionException {
          try {
              int _type = T__20;
              int _channel = DEFAULT_TOKEN_CHANNEL;
              // BELStatement.g:34:7: ( 'r' )
              // BELStatement.g:34:9: 'r'
              {
              match('r'); 
  
              }
  
              state.type = _type;
              state.channel = _channel;
          }
          finally {
          }
      }
docs: $ANTLR start "T__20"