class DiffOperation extends
array getObsoleteMessages(string $domain) Returns obsolete messages ('obsolete') after operation
array getNewMessages(string $domain) Returns new messages ('new') after operation.
MessageCatalogueInterface
interface OperationInterface Represents an operation on catalogue(s). An instance of this
array getDomains() Returns domains affected by operation.
array getMessages(string $domain) Returns all valid messages ('all') after operation.
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