<s> """<STR_LIT>""" <EOL> class SiderError ( Exception ) : <EOL> """<STR_LIT>""" <EOL> class TransactionError ( SiderError ) : <EOL> """<STR_LIT>""" <EOL> class DoubleTransactionError ( TransactionError ) : <EOL> """<STR_LIT>""" <EOL> class CommitError ( TransactionError ) : <EOL> """<STR_LIT>""" <EOL> class ConflictError ( TransactionError ) : <EOL> """<STR_LIT>""" </s>
