private IBuiltComponentMapping GetMappingWithSameReferenceType(string componentType = "MyType", string rootComponentName = "Employees")
        {
            var mapping = new ComponentMapping <Employee>(componentType);

            mapping.WithReference(emp => emp.EmployedIn, "test_ref");
            mapping.WithReference(emp => emp.Roles, "test_ref");
            mapping.WithPreexistingHierarchyReference(rootComponentName);
            return(mapping);
        }