pub trait ValidityChildSliceHelper {
// Required method
fn unsliced_child_and_slice(&self) -> (&ArrayRef, usize, usize);
// Provided method
fn sliced_child_array(&self) -> ArrayRef { ... }
}pub trait ValidityChildSliceHelper {
// Required method
fn unsliced_child_and_slice(&self) -> (&ArrayRef, usize, usize);
// Provided method
fn sliced_child_array(&self) -> ArrayRef { ... }
}