Extra method argument resolvers can be added to customize the method
signature that can be handled.
By default, the validation process redirects to a no-op implementation, see
setValidator(Validator) to customize it. The ConversionService
can be customized in a similar manner to tune how the message payload
can be converted
Configure the complete list of supported argument types effectively overriding
the ones configured by default. This is an advanced option. For most use cases
it should be sufficient to use setCustomArgumentResolvers(java.util.List).