org.mule.umo
Interfaces 
UMOComponent
UMODescriptor
UMOEncryptionStrategy
UMOEvent
UMOEventContext
UMOExceptionPayload
UMOFilter
UMOImmutableDescriptor
UMOInterceptor
UMOMessage
UMOSession
UMOTransaction
UMOTransactionConfig
UMOTransactionFactory
Classes 
FutureMessageResult
Invocation
Exceptions 
ComponentException
MessagingException
TransactionException
UMOException