Method completion

crates/opencode-lsp/src/lib.rs:433–464

(
        &self,
        path: &Path,
        line: u32,
        character: u32,
    )

    }

    pub async fn completion(
        &self,
        path: &Path,
        line: u32,
        character: u32,
    ) -> Result<Option<Vec<lsp_types::CompletionItem>>, LspError> {
        let uri = path_to_uri(path)?;

        let params = lsp_types::CompletionParams {
            text_document_position: lsp_types::TextDocumentPositionParams {
                text_document: TextDocumentIdentifier { uri },
                position: lsp_types::Position { line, character },
            },
            work_done_progress_params: Default::default(),
            partial_result_params: Default::default(),
            context: None,
        };

        let result = self
            .request("textDocument/completion", serde_json::to_value(params)?)
            .await?;

        if result.is_null() {
            return Ok(None);
        }

        let response: lsp_types::CompletionResponse = serde_json::from_value(result)?;
        Ok(Some(match response {
            lsp_types::CompletionResponse::Array(items) => items,
            lsp_types::CompletionResponse::List(list) => list.items,
        }))
    }

    pub async fn references(
        &self,