Javadoc says method may return null, but code does not allow it

[wonwoo]

The Javadoc of MappingRelationalConverter.getPotentiallyConvertedSimpleRead says the method may return null

/**
 * @return the converted value if a conversion applies or the original value.
 * Might return {@code null}.
 */

However, in the implementation, null is not allowed:

Object converted = getConversionService().convert(...);
Assert.state(converted != null, "Converted must not be null");

Could you clarify whether the Javadoc is outdated or the code behavior is a mistake?

[schauder]

The JavaDoc was wrong.