pub type PFN_vkGetPastPresentationTimingEXT = unsafe extern "system" fn(_device: Device, _past_presentation_timing_info: *const PastPresentationTimingInfoEXT, _past_presentation_timing_properties: *mut PastPresentationTimingPropertiesEXT) -> Result;pub type PFN_vkGetPastPresentationTimingEXT = unsafe extern "system" fn(_device: Device, _past_presentation_timing_info: *const PastPresentationTimingInfoEXT, _past_presentation_timing_properties: *mut PastPresentationTimingPropertiesEXT) -> Result;