Function is_operation_completed 

fn is_operation_completed<N: Network>(
    sequence: &ScriptSequenceKind<N>,
    sequence_index: usize,
    index: usize,
) -> bool
where
    N::TxEnvelope: for<'de> Deserialize<'de> + Serialize,

Returns true if the operation has a receipt or a recorded revert for its own hash.