typedef VkResult (VKAPI *PFN_vkResetDescriptorPool)(VkDevice device, VkDescriptorPool descriptorPool);
typedef VkResult (VKAPI *PFN_vkAllocDescriptorSets)(VkDevice device, VkDescriptorPool descriptorPool, VkDescriptorSetUsage setUsage, uint32_t count, const VkDescriptorSetLayout* pSetLayouts, VkDescriptorSet* pDescriptorSets, uint32_t* pCount);
typedef VkResult (VKAPI *PFN_vkFreeDescriptorSets)(VkDevice device, VkDescriptorPool descriptorPool, uint32_t count, const VkDescriptorSet* pDescriptorSets);
typedef VkResult (VKAPI *PFN_vkUpdateDescriptorSets)(VkDevice device, uint32_t writeCount, const VkWriteDescriptorSet* pDescriptorWrites, uint32_t copyCount, const VkCopyDescriptorSet* pDescriptorCopies);
typedef VkResult (VKAPI *PFN_vkCreateDynamicViewportState)(VkDevice device, const VkDynamicViewportStateCreateInfo* pCreateInfo, VkDynamicViewportState* pState);
typedef VkResult (VKAPI *PFN_vkResetDescriptorPool)(VkDevice device, VkDescriptorPool descriptorPool);
typedef VkResult (VKAPI *PFN_vkAllocDescriptorSets)(VkDevice device, VkDescriptorPool descriptorPool, VkDescriptorSetUsage setUsage, uint32_t count, const VkDescriptorSetLayout* pSetLayouts, VkDescriptorSet* pDescriptorSets, uint32_t* pCount);
typedef VkResult (VKAPI *PFN_vkFreeDescriptorSets)(VkDevice device, VkDescriptorPool descriptorPool, uint32_t count, const VkDescriptorSet* pDescriptorSets);
typedef VkResult (VKAPI *PFN_vkUpdateDescriptorSets)(VkDevice device, uint32_t writeCount, const VkWriteDescriptorSet* pDescriptorWrites, uint32_t copyCount, const VkCopyDescriptorSet* pDescriptorCopies);
typedef VkResult (VKAPI *PFN_vkCreateDynamicViewportState)(VkDevice device, const VkDynamicViewportStateCreateInfo* pCreateInfo, VkDynamicViewportState* pState);