org.mule.api
Interfaces 
EncryptionStrategy
EndpointAnnotationParser
ExceptionPayload
MessageProcessorAnnotationParser
MuleContext
MuleEvent
MuleEventContext
MuleMessage
MuleMessageCollection
MuleSession
NamedObject
ThreadSafeAccess
Classes 
FutureMessageResult
ThreadSafeAccess.AccessControl
Exceptions 
AnnotationException
DefaultMuleException
MessagingException
MuleException
MuleRuntimeException