pub type PFN_vkGetDescriptorSetLayoutHostMappingInfoVALVE = unsafe extern "system" fn(_device: Device, _binding_reference: *const DescriptorSetBindingReferenceVALVE, _host_mapping: *mut DescriptorSetLayoutHostMappingInfoVALVE);pub type PFN_vkGetDescriptorSetLayoutHostMappingInfoVALVE = unsafe extern "system" fn(_device: Device, _binding_reference: *const DescriptorSetBindingReferenceVALVE, _host_mapping: *mut DescriptorSetLayoutHostMappingInfoVALVE);