UI Builder Client script to set form Field value

[SundaramR]

Hello,
I have a UI Builder page with a form component, and the form controller (id=record) is set to use the incident table. I want to update a form field’s value using a client script. I tried two methods based on the documentation, but neither worked. I’m looking for guidance on how to set a form field value using a client script.

document site.

document site 

both of them throws method not found error.

   api.data.record.setFieldValue('short_description', 'Updated from UI Builder');

   api.data.gform.setValue({fieldName: 'short_description', value: 'short description'});

Below snippet works, but I am looking to set the value using api object. 

/**
* @Param {params} params
* @Param {api} params.api
* @Param {any} params.event
*/
function evaluateEvent({api, event}) {
	return {
		fieldName: "short_description",
		value: "Deploy Scope",
		displayValue: ""
	};

Thanks