Looking for the 'Boyum.Utilities.FileHandler.Model' package used in the UFFI. I see it is in the UFFI but I want to use it in Visual Studio projects.

I am using UFFI but I think testing would be much simpler in Visual Studio than within Boyum in SAP.  Where do I get these 'packages"?  

using Boyum.Utilities.FileHandler.Model;
using SAPbobsCOM;
using SBO.DI;

I must have them because within UFFI I can use them.  But I'm not certain how to find them and load into Visual Studio.