private static boolean catchClausesAreEquivalent(GrCatchClause clause1, GrCatchClause clause2) {
    return parametersAreEquivalent(clause1.getParameter(), clause2.getParameter()) &&
        openBlocksAreEquivalent(clause1.getBody(), clause2.getBody());
  }
private static boolean catchClausesAreEquivalent(GrCatchClause clause1, GrCatchClause clause2)