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      1 tree grammar t049treeparsercWalker;
      2 options {
      3     language=JavaScript;
      4     ASTLabelType=CommonTree;
      5 }
      6 a : b b ;
      7 b : ID INT    {this.capture($ID+" "+$INT+"\n");}
      8   | ^(ID INT) {this.capture("^("+$ID+" "+$INT+")");}
      9   ;
     10