Describe the enhancement requested

Currently MemoryManager objects define functionality to Copy or View entire buffers. Occasionally there is the need to only copy a single value or slice from a buffer (see #39770 (comment)). It's overkill to do a bunch of whole Buffer operations and manually slicing just to copy 4 or 8 bytes.

Instead we can add new methods to the MemoryManager interface such as CopyBufferSlice etc.

Component(s)

C++