jhorstmann commented on code in PR #1819:
URL: https://github.com/apache/arrow-rs/pull/1819#discussion_r892529479


##########
arrow/src/datatypes/native.rs:
##########
@@ -351,8 +382,11 @@ impl JsonSerializable for f64 {
 }
 
 impl ArrowNativeType for f16 {}
+impl private::Sealed for f16 {}
 impl ArrowNativeType for f32 {}
+impl private::Sealed for f32 {}
 impl ArrowNativeType for f64 {}
+impl private::Sealed for f64 {}
 
 /// Allows conversion from supported Arrow types to a byte slice.
 pub trait ToByteSlice {

Review Comment:
   The `ToByteSlice` trait would also be a candiate for sealing as it also used 
for transmuting and should only be used on ArrowNativeTypes and slices of 
ArrowNativeType.



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