When the custom conversions are checked before collection and map converters, it is not possible to use custom converters for lists and maps.
If a custom converter for a list or a map is defined, it is executed here and not from within the `collectionConverter` where it should be executed.
So I think collections and maps should be handled beforehand.
Maybe lines 2064-2066 might not be needed ad all as this case is covered with line 2081

… the elements of a list or map have been converted to be able to use `Converter<List<?>, List<?>>` and `Converter<Map<?, ?>, Map<?, ?>>` Converters.