[fpc-pascal] Check In Interface Type Helpers

[Michael Van Canneyt]

On Tue, 22 Aug 2017, Anthony Walter wrote:

> I just wanted to point out that revision 37023 Sven added type helper
> support for interfaces.
>
> Good job and thank you Sven!
>

I'm having trouble understanding why this could be useful (apart from completeness).
The only thing I can come up with is adding properties:

   Property SomeProp : TSomeType Read GetSomeProp Write SetSomeProp;

where GetSomeProp and SetSomeProp are part of the interface.

Any other examples ?

Michael.