How to use the vscode-languageclient.Trace.Verbose function in vscode-languageclient

vscode.workspace.createFileSystemWatcher('**/*.app.src'),
                vscode.workspace.createFileSystemWatcher('**/rebar.config')
            ]
        }
    }

    let escriptPath = await getEscriptPath()

    // Create the language client and start it.
    let client = new LanguageClient('Erlang Server',
        () => {
            return startServer(extensionPath, escriptPath, channel)
        },
        clientOptions)
    client.registerProposedFeatures();
    client.trace = Trace.Verbose;
    client.onReady().then(() => { console.log('Erlang server ready!') },
        (reason) => { throw Error('Erlang server error:  ' + reason) })
    return client.start()
}

fileEvents: this._fsWatcher,
                configurationSection: 'papyrus',
            },
        };

        // In order to find the new process id, we need to exclude any current running instances of the language server.
        let existingProcessIds: number[];
        if (process.platform === 'win32' && process.env['PAPYRUS_EXTENSION_DEBUG']) {
            const processes = await psList();
            existingProcessIds = processes.filter((p) => p.name === 'DarkId.Papyrus.Host.exe').map((p) => p.pid);
        }

        // Create the language client and start the client.
        this._client = new LanguageClient('papyrus', 'Papyrus Language Service', this._serverOptions, clientOptions);

        this._client.trace = Trace.Verbose;
        this._client.start();

        await this._client.onReady();

        if (process.platform === 'win32' && process.env['PAPYRUS_EXTENSION_DEBUG']) {
            const processes = await psList();
            const serverProcessId = processes.find(
                (p) => p.name === 'DarkId.Papyrus.Host.exe' && existingProcessIds.indexOf(p.pid) === -1
            )!.pid;

            if (serverProcessId) {
                exec(`vsjitdebugger.exe -p ${serverProcessId}`);
            }
        }
    }

fileEvents: this._fsWatcher,
                configurationSection: 'papyrus',
            },
        };

        // In order to find the new process id, we need to exclude any current running instances of the language server.
        let existingProcessIds: number[];
        if (process.platform === 'win32' && process.env['PAPYRUS_EXTENSION_DEBUG']) {
            const processes = await psList();
            existingProcessIds = processes.filter((p) => p.name.startsWith('DarkId.Papyrus.Host')).map((p) => p.pid);
        }

        // Create the language client and start the client.
        this._client = new LanguageClient('papyrus', 'Papyrus Language Service', this._serverOptions, clientOptions);

        this._client.trace = Trace.Verbose;
        this._clientDisposable = this._client.start();

        await this._client.onReady();

        if (!this._clientDisposable) {
            return;
        }

        if (process.platform === 'win32' && process.env['PAPYRUS_EXTENSION_DEBUG']) {
            const processes = await psList();
            const serverProcessId = processes.find(
                (p) => p.name.startsWith('DarkId.Papyrus.Host') && existingProcessIds.indexOf(p.pid) === -1
            )!.pid;

            if (serverProcessId) {
                exec(`vsjitdebugger.exe -p ${serverProcessId}`);

function chosenTrace(): Trace {
    let config = vscode.workspace.getConfiguration("autousing").get("trace.server");
    switch (config) {
        case "off": return Trace.Off;
        case "messages": return Trace.Messages;
        case "verbose": return Trace.Verbose;
    }
}