What is the best way to check using bitcoin core RPC if a transaction is re-orged?

My current approach is to check the following:

fn is_orphaned(..) {
    let res = get_raw_transaction(txid)
    return confirmations == 0 && blockhash != null
}

Is the above way correct? And is there a more direct way of checking whether a transaction is re-orged? I am running bitcoin core with txindex = 1



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