The Immutable USTRUCT specifier adorns only a handful of structs in the NoExportTypes.h file as of 4.26. The Struct Specifier documentation gives very little information about what this specifier does. It just says that it is being phased out. Can anyone shed light on what this does/did and why it is being phased out?
Hello! Comments say this about it
/** Indicates that this struct uses binary serialization; it is unsafe to add/remove members from this struct without incrementing the package version */Thanks! Just what I was after.