Method completion

src/server.rs:705–707

(&self, params: CompletionParams)

    }

    async fn completion(&self, params: CompletionParams) -> Result<Option<CompletionResponse>> {
        self.handle_completion(params).await
    }

    async fn completion_resolve(&self, params: CompletionItem) -> Result<CompletionItem> {
        Ok(self.handle_completion_resolve(params))