Represents a mention. A mention can refer to various entities and potentially include actions associated with them.
Represents a mention of a generic event.
Represents a mention of a room.
Represents a mention of a room alias
Represents a mention of a user.
The optional display name associated with the mention, if applicable.
The textual representation of the mention within the message it appears. Use with care, IntRange preferred
If exists, the parameters provided in the URI