reorganized code into separate files

util/validators/arguments/mustBeGeometry.m

@@ -0,0 +1,10 @@
+function mustBeGeometry(geometry)
+    validGeometries = ["rectangularPrism";];
+    if isa(geometry, 'cell')
+        for ii = 1:size(geometry, 1)
+            assert(any(arrayfun(@(x) isa(geometry{ii}, x), validGeometries)), "Geometry in index %d is not a valid geometry class", ii);
+        end
+    else
+        assert(any(arrayfun(@(x) isa(geometry, x), validGeometries)), "Geometry is not a valid geometry class");
+    end
+end