The problem I was battling yesterday reduces to a single relevant question: How do you define a type for a class method pointer?

The problem I was battling yesterday reduces to a single relevant question: How do you define a type for a class method pointer?

This does not work:
  TOFunc = function(const ID: Integer; Data: string): Integer of object;

My workaround at present is not to use the class method, but to create a simple function in the unit which calls the class method. A one line wrapper. That then makes it possible to use this type:
TMyFunc = function(const ID: Integer; Data: string): Integer;

It would be much better, in the context of this requirement, to define the type for the class method. An example function is here:
  TMyClassOne = class
    class function Execute(const ID: Integer; Data: string): Integer;
  end;

Ultimately, the delegates will be declared in a const array of records.

As written, when I attempt to call a delegate, it throws an AV.