如何从扩展中访问vscode breadcrumb的文本

const vscode = require('vscode');

function activate(context) {
    let disposable = vscode.commands.registerCommand('extension.getBreadcrumbText', function () {
        const editor = vscode.window.activeTextEditor;
        if (editor) {
            const document = editor.document;
            const position = editor.selection.active;

            // 获取文档符号提供者
            const provider = vscode.languages.getDocumentSymbolProvider(document.languageId);
            if (provider) {
                provider.provideDocumentSymbols(document, position).then(symbols => {
                    if (symbols && symbols.length > 0) {
                        // 获取Breadcrumb文本
                        const breadcrumbText = symbols.map(symbol => symbol.name).join(' > ');
                        vscode.window.showInformationMessage(`Breadcrumb Text: ${breadcrumbText}`);
                    } else {
                        vscode.window.showInformationMessage('No symbols found.');
                    }
                });
            } else {
                vscode.window.showInformationMessage('No document symbol provider available.');
            }
        } else {
            vscode.window.showInformationMessage('No active editor found.');
        }
    });

    context.subscriptions.push(disposable);
}

exports.activate = activate;