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    @FallbackConverter
    public static <T> T convertTo(Class<T> type, Exchange exchange, Object value, TypeConverterRegistry registry)

Or you can use the non generic signature.

    @FallbackConverter
    public static Object convertTo(Class type, Exchange exchange, Object value, TypeConverterRegistry registry)

And the method name can be anything (convertTo is not required as a name), so it can be named convertMySpecialTypes if you like.
The Exchange parameter is optional, just as its with the regular @Converter methods.

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