These contracts are slightly modified versions of the base Open Zeppelin contracts.
They are based on @openzeppelin/contracts-upgradeable
version 4.0.0
This document serves as a complete list of changes:
_balances
is now internal (was private)_allowances
is now internal (was private)
_updateAccountSnapshot
is now internal (was private)_updateTotalSupplySnapshot
is now internal (was private)