improved comment

src/main/java/org/gcube/informationsystem/resourceregistry/instances/base/ElementManagement.java

@@ -148,8 +148,8 @@ public abstract class ElementManagement<El extends OElement, T extends Type> {
 	protected Operation operation;
 	
 	/**
-	 * A Delete operation has a cascade impact we could want to know the impact
-	 * Instances affected by a delete
+	 * A Delete an addToContext and a RemoveFromContext operation has a cascade impact 
+	 * we want to know the impact, i.e. instances involved
 	 */
 	protected final Map<UUID,JsonNode> affectedInstances;