docs: property, prototype, proxy diagrams

property/README.md

@@ -31,6 +31,10 @@ In plain words
 
 > Define and manage a dynamic set of properties for an object, allowing customization without altering its structure.
 
+Sequence diagram
+
+![Property sequence diagram](./etc/property-sequence-diagram.png)
+
 ## Programmatic Example of Property Pattern in Java
 
 The Property design pattern, also known as Prototype inheritance, is a pattern that allows objects to be created from other objects, forming object hierarchies. This pattern is particularly useful when you want to create a new object that is a slight variation of an existing object.