UML-diagram.md

-![UML_diagram__3_.svg](uploads/57fae41f968c7af0d83a07f7693f4fc4/UML_diagram__3_.svg)
\ No newline at end of file
+![UML_diagram__4_.svg](uploads/aa00c8b0d2b2b28d30d4e8d719adb6a2/UML_diagram__4_.svg)
\ No newline at end of file