Jefffrey commented on issue #18881:
URL: https://github.com/apache/datafusion/issues/18881#issuecomment-3567846975
> If there is a good way to deal with the mentioned feature flag issue, I
think we should add this lint rule.
It would look something like this:
```rust
fn get_metadata<'a>(
&'a mut self,
#[cfg_attr(not(feature = "parquet_encryption"),
expect(unused_variables))]
options: Option<&'a ArrowReaderOptions>,
) -> BoxFuture<'a, parquet::errors::Result<Arc<ParquetMetaData>>> {
```
Doable, but a little verbose.
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