presto-verifier/src/main/java/io/prestosql/verifier/QueryResult.java/QueryResult/addSuppressed
class QueryResult:    public void addSuppressed(Throwable throwable)
    {
        checkState(exception != null, "exception is null");
        checkArgument(throwable != null, "throwable is null");
        exception.addSuppressed(throwable);
    }