pub trait PartitionKeysRequired<'a> {
// Required method
fn partition_keys(&self) -> &'a PartitionKeys;
// Provided method
fn add_header(&self, builder: Builder) -> Builder { ... }
}
pub trait PartitionKeysRequired<'a> {
// Required method
fn partition_keys(&self) -> &'a PartitionKeys;
// Provided method
fn add_header(&self, builder: Builder) -> Builder { ... }
}