Will the classes in mx.controls.* from Flex3 that have a Sparc equivalent in Flex 4 still be supported in FlashPlayer after 2/28/2015? In other words I'm using Flex 4, but using the mx.control.* class instead of the corresponding sparc class?

Will the classes in mx.controls.* from Flex3 that have a Sparc equivalent in Flex 4 still be supported in FlashPlayer after 2/28/2015? In other words I'm using Flex 4, but using the mx.control.* class instead of the corresponding sparc class.