| Interface | Description | 
|---|---|
| ContentTypes | An interface with constants about the supported content types used in  Message.getMainContentType(). | 
| ConversationStatus | This represents the information for the last read message for a certain user in a certain conversation | 
| DataSubTypes | |
| DataTypes | |
| Message | The message object that holds all relevant data describing the
 event, message, action, etc | 
| MessageAudit | |
| MessageBuilder | The message builder API to create messages to be sent to a conversation using the  MessageBuilder.send(String)method within the builder. | 
| MessageQuery | |
| MessageService | |
| Reaction | |
| ReactionQuery | 
| Enum | Description | 
|---|---|
| Category | The enumeration of message categories. | 
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