How to addParameter and validateattributes for several values at once (OOP)?

Basically I have the MainObject and I want to add to this object the Obj1 (FilterObj) e Obj2 (RotObj). When I just need to add one object I do something like:

function set.PipeBolt(obj,val)
          if ~isempty(val)
                validateattributes(val, {'FilterObj'},{'size',[NaN,1]});
          else
                    val = FilterObj.empty;
          end
            obj.PipeBolt = val;
end

and in constructer something like

addParameter(parser,'PipeBolt',FilterObj.empty,@(x)validateattributes(x,'{FilterObj'},'PipeLineBolt','PipeBolt'))

let say that FilterObj is Obj1 but for Obj1 (RotObj) how can I adjust the code to pass and validate atributes both types of objects?