[Vulkan only] return 0. Otherwise it returns the length of the number of bytes necessary to hold this string including the trailing null. The string will be a space separated list of required device extensions to enable in VkCreateDevice
See Implementation
[Vulkan only] return 0. Otherwise it returns the length of the number of bytes necessary to hold this string including the trailing null. The string will be a space separated list of required device extensions to enable in VkCreateDevice