How do you call a business object method in an ABAP?

I have been asked to call a method that exists in BUS2080 called 'ServiceNotification.CreatesingleContainerDialog'. This is to do with service notifications.

Basically I need to be able to default in customer and contact information from an ABAP similar to what appears in IW51 after you have input notification type and defaulting in customer and contact information without filling in the mandatory fields as these will be filled in by the customer once the screen appears after the call.

Reason I am trying to use the method and not call transaction iw51 is that the users want the functionality similar to how they call IW51 from CIC0 where CRSN is the call for service notification which defaults in the customer and contact information leaving the required fields empty. When the customer goes in they see sold to party and contact persons information and can fill in the relevant fields. This call in CIC uses the method I have stated above. I have tried locating the class but to no avail.

Thanks

Larissa