Add dereference operator for BorrowedPtr.

src/Memory/BorrowedPtr.hpp

@@ -29,6 +29,11 @@ namespace ArbUt {
             AssertNotNull(_raw);
             return _raw;
         }
+        inline T operator*() const noexcept {
+            AssertNotNull(_raw);
+            return *_raw;
+        }
+
         inline T* GetRaw() const noexcept { return _raw; }
 
         inline bool operator==(const BorrowedPtr& rhs) const noexcept { return _raw == rhs._raw; }