pub trait CompletionModel: Send + Sync {
// Required method
fn completion<'life0, 'async_trait>(
&'life0 self,
request: CompletionRequest,
) -> Pin<Box<dyn Future<Output = Result<CompletionResponse<()>, CompletionError>> + Send + 'async_trait>>
where Self: 'async_trait,
'life0: 'async_trait;
}