We have a page list and we need the values to be stored in one property so that we can use this property in Report definition

The report definition is in different class and the page list is in different class so we have done a class join for now.

Is this scenario where shall we create this property.

Can this scenario be achieved with a function ?

I was thinking if it can be achieved as a function then we can use this function is a report definition without creating a new property.