Here are the classes, structs, unions and interfaces with brief descriptions:

CVmaAllocation	Represents single memory allocation
CVmaAllocationCreateInfo
CVmaAllocationInfo	Parameters of VmaAllocation objects, that can be retrieved using function vmaGetAllocationInfo()
CVmaAllocator	Represents main object of this library initialized
CVmaAllocatorCreateInfo	Description of a Allocator to be created
CVmaBudget	Statistics of current memory usage and available budget, in bytes, for specific memory heap
CVmaDefragmentationContext	Represents Opaque object that represents started defragmentation process
CVmaDefragmentationInfo	Deprecated. Optional configuration parameters to be passed to function vmaDefragment()
CVmaDefragmentationInfo2	Parameters for defragmentation
CVmaDefragmentationStats	Statistics returned by function vmaDefragment()
CVmaDeviceMemoryCallbacks	Set of callbacks that the library will call for `vkAllocateMemory` and `vkFreeMemory`
CVmaPool	Represents custom memory pool
CVmaPoolCreateInfo	Describes parameter of created VmaPool
CVmaPoolStats	Describes parameter of existing VmaPool
CVmaRecordSettings	Parameters for recording calls to VMA functions. To be used in VmaAllocatorCreateInfo::pRecordSettings
CVmaStatInfo	Calculated statistics of memory usage in entire allocator
CVmaStats	General statistics from current state of Allocator
CVmaVulkanFunctions	Pointers to some Vulkan functions - a subset used by the library