SPI Driver Library - new versions of functions why 2 Buffer handles? (lelsteph)

Hello Using Harmony version 1.07, PIC32MZ2048EFN064.I struggling to understand the library interfaces.There are 2 sets of functions: there is a new set with "2" at the end of all functions. Ex: DRV_SPI_BufferAddRead and DRV_SPI_BufferAddRead2.For all "pre..