pub trait ExtensionArrayTrait: Deref<Target = Array> {
// Required method
fn storage_data(&self) -> Array;
// Provided method
fn ext_dtype(&self) -> &Arc<ExtDType> { ... }
}
pub trait ExtensionArrayTrait: Deref<Target = Array> {
// Required method
fn storage_data(&self) -> Array;
// Provided method
fn ext_dtype(&self) -> &Arc<ExtDType> { ... }
}