Claimable Balance Id
class ClaimableBalanceId
A claimable balance id, resolved from any of the spellings it is written in.
The same balance reaches an application under four names: the B... strkey, the bare hash as hexadecimal, and that hash behind a type discriminant carried either in the single byte the strkey body leads with or in the four big-endian bytes the XDR union writes (the spelling Horizon reports). forId reads all of them and this type reports the one balance they name, so a caller may pass on whichever spelling it received.