Method filter

datafusion/datasource/src/test_util.rs:89–91

(&self)

    }

    fn filter(&self) -> Option<Arc<dyn PhysicalExpr>> {
        self.filter.clone()
    }

    fn with_batch_size(&self, _batch_size: usize) -> Arc<dyn FileSource> {
        Arc::new(Self { ..self.clone() })