Set Field Value of a virtual field

Here's a Typescript example:

const frameworkProvider: IUiEventsFrameworkProvider = await CX_SVC_UI_EVENTS_FRAMEWORK.uiEventsFramework.initialize('MyFirstExtensionID', 'v1');
    const tabContext: ITabContext = await frameworkProvider.getTabContext();
    const recordContext: IRecordContext = await tabContext.getActiveRecord();
      
    const requestObject: ISetFieldValueOperationRequest = (frameworkProvider.requestHelper.createPublishRequest('cxEventBusSetFieldValueOperation') as ISetFieldValueOperationRequest);
    requestObject.field().setValue('ServiceRequest.VirtualField', 'New Value');
    recordContext.publish(requestObject).then((message) => {
        const response = message as ISetFieldValueResponse;
        // custom code
    }).catch((error: IErrorData) => {
        // custom code
    });

Here's a JavaScript example:

const frameworkProvider = await CX_SVC_UI_EVENTS_FRAMEWORK.uiEventsFramework.initialize('MyFirstExtensionID', 'v1');
    const tabContext = await frameworkProvider.getTabContext();
    const recordContext = await tabContext.getActiveRecord();
      
    const requestObject = frameworkProvider.requestHelper.createPublishRequest('cxEventBusSetFieldValueOperation');
    requestObject.field().setValue('ServiceRequest.VirtualField', 'New Value');
    recordContext.publish(requestObject).then((message) => {
        // custom code
    }).catch((error) => {
        // custom code
    });