spaceDisplayName property
The display name of the source space or DM at the time of forwarding.
For SPACE, this is the space name. For DIRECT_MESSAGE, this is the
other participant's name (e.g., "User A"). For GROUP_CHAT, this is a
generated name based on members' first names, limited to 5 including the
creator (e.g., "User A, User B").
Output only.
Implementation
core.String? spaceDisplayName;