how to exclude null value field from custom response object

Hi,

Is it possible to exclude null value field from response where return type is custom object.

I want to exclude "displayString" field if it's value is null from response.

Below is the swagger details :

DeviceMonitoringDetailsVo:
type: object
properties:
field:
type: string
description: device-detail field item
displayString:
type: string
nullable: false
description: field-item display name in UI
value:
type: string
description: value of the device-detail field
editable:
type: boolean
description: Determines if field is editable by user/UI

Thanks,

Navneet