Backward compatibility to the Notification library

Former-commit-id: 91a6cbdadd70c8d39d5f89b2d9ceeffd432bde56 [formerly a73dffcf7142ce09aee184ea554ffd6a0b4ad663] [formerly 9fe1c0aae4abdef8b0277a4f59b34b6dfc1b76dd [formerly 437a152e94a7edb1b8410b00a0706d5c3c0fcdb8]] [formerly 145f8442a8a9762332d33f1af814fb83355c0bb1 [formerly f442071856bfe2e7968111bb8d9e5246af984efd] [formerly 89ce001b13bf88542329189d624cd1ca16ad1c16 [formerly d524a51ce00cf263e5633a243be39e088ab6b09f]]]
Former-commit-id: 76a3353d7db49e7035d2b8245e2f1f9b6c2f7aca [formerly 0731eb5668ba3cbf6b7016ad2f7398869608a91c] [formerly d8497a171e3760e4ff1f8f3ef7f8ea339974130b [formerly 612feb4d8fc1660aa90701723ff860a8571c7ba4]]
Former-commit-id: 10a7b3dd55d5276ee18ecd98db2fe12eb4779e26 [formerly 85ed553e2a3f17bf17a4ceec3d4025d2f02dd1c3]
Former-commit-id: 2ed3eea142e8ddebea444fd9c7d64405424f444c
Former-commit-id: b6e1b5b

Author: lmbelo

src/Tools/Notification/PyTools.Notification.Channel.pas

@@ -207,6 +207,32 @@ implementation
   System.Rtti,
   PyTools.Exception;
 
+type
+  //For backward compatibility
+  TRttiObjectHelper = class helper for TRttiObject
+  public
+    function GetAttribute(AAttrClass: TCustomAttributeClass): TCustomAttribute; overload;
+    function GetAttribute<T: TCustomAttribute>: T; overload; inline;
+  end;
+
+{ TRttiObjectHelper }
+
+function TRttiObjectHelper.GetAttribute(
+  AAttrClass: TCustomAttributeClass): TCustomAttribute;
+var
+  LAttr: TCustomAttribute;
+begin
+  for LAttr in GetAttributes do
+    if LAttr is AAttrClass then
+      Exit(LAttr);
+  Result := nil;
+end;
+
+function TRttiObjectHelper.GetAttribute<T>: T;
+begin
+  Result := T(GetAttribute(T));
+end;
+
 { RequestChannelAttribute }
 
 constructor RequestChannelAttribute.Create(const AIdentifier: TRequestChannelIdentifier);