@Nullable abstract fun resolveArgument(parameter: MethodParameter, message: Message<*>): Any
Resolves a method parameter into an argument value from a given message.
parameter - the method parameter to resolve. This parameter must have previously been passed to #supportsParameter(org.springframework.core.MethodParameter) which must have returned true.
message - the currently processed message
Exception - in case of errors with the preparation of argument values
Return
the resolved argument value, or null