Disable email notifications if notification subject contains ‘ABC Company’

Summary:

Hi Team,

I'd like to check how this can be done with BPM configuration.

Requirement:

For Appointment, whenever there is an update performed on the appointment, don’t send email notifications to users (owner/resources) if notification subject contains ‘ABC Company’

Approach:

Configure BPM Task – AppointmentHumanTask. In the Assignees, update the following steps

SoaOLabel.UsersActionNotification
SoaOLabel.UsersInformationNotification.ForYourInformationTypeofNotifi

How can I use expression builder to achieve the following?
if $Task/task:task/task:title contains ‘ABC Company’, return null, else return /task:task/task:payload/task:NotificationUser.

Content (please ensure you mask any confidential information):

as above

Version (include the version you are using, if applicable):