pub trait TableFunction {
// Required method
fn process(&mut self, input: RecordBatch) -> Result<Option<RecordBatch>>;
// Provided method
fn finalize(&mut self) -> Result<Option<RecordBatch>> { ... }
}pub trait TableFunction {
// Required method
fn process(&mut self, input: RecordBatch) -> Result<Option<RecordBatch>>;
// Provided method
fn finalize(&mut self) -> Result<Option<RecordBatch>> { ... }
}