UUID first three sections are big endian representations, but x86 architecture is little-endian, so we need to switch the byte order. https://datatracker.ietf.org/doc/html/rfc4122#section-4.1.2
uuid = '27b40832-9344-4110-ace8-1e6bf277219f';
flipped = '3208b427-4493-1041-ace8-1e6bf277219f';
We don't need to switch the clock_seq_hi_andreserved or clock_seq_low
because they are a UInt8. They just happen to be grouped together in the
string representation.
We also don't switch the node value because it is an unsigned 48 bit integer
separated into 6 nodes.
Use URL and Filename Safe Alphabet in Base64 https://datatracker.ietf.org/doc/html/rfc4648#section-5
ShortGuid C# implementation https://github.com/csharpvitamins/CSharpVitamins.ShortGuid/blob/master/CSharpVitamins.ShortGuid/ShortGuid.cs
C# Guid mscorlib system implementation https://github.com/microsoft/referencesource/blob/master/mscorlib/system/guid.cs#L708
This does not just change a guid to base 64 // https://www.fileformat.info/tool/guid-base64.htm J7QIMpNEQRCs6AAAHmvydw