[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 instance extensions to enable in VkCreateInstance
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 instance extensions to enable in VkCreateInstance