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
CVmaDefragmentationInfo	Optional configuration parameters to be passed to function vmaDefragment()
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