[#24] Client: Implement pool part2

Signed-off-by: Pavel Gross <p.gross@yadro.com>

src/FrostFS.SDK.ClientV2/Models/Object/FrostFsObject.cs

@@ -1,4 +1,4 @@
-using FrostFS.SDK.ClientV2;
+using System;
 
 namespace FrostFS.SDK;
 
@@ -67,7 +67,7 @@ public class FrostFsObject
     public void SetParent(FrostFsObjectHeader largeObjectHeader)
     {
         if (Header?.Split == null)
-            throw new InvalidObjectException("The object is not initialized properly");
+            throw new ArgumentNullException(nameof(largeObjectHeader), "Split value must not be null");
 
         Header.Split.ParentHeader = largeObjectHeader;
     }