question: public static Class < ? > resolvePrimitiveIfNecessary ( Class < ? > clazz ) { Assert . notNull ( clazz , "Class must not be null" ) ; return ( clazz . isPrimitive ( ) && clazz != void . class ? primitiveTypeToWrapperMap . get ( clazz ) : clazz ) ; }
target:  Resolve the given class if it is a primitive class, returning the corresponding primitive wrapper type instead.