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      1 // @@ANTLR Tool Options@@: -trace
      2 tree grammar t051treeRewriteASTuWalker;
      3 options {
      4     language=JavaScript;
      5     output=AST;
      6     ASTLabelType=CommonTree;
      7     tokenVocab=t051treeRewriteASTu;
      8     rewrite=true;
      9 }
     10 s : ID a ;
     11 a : INT -> INT["1"]
     12   ;
     13