createTime property
For spaces created in Chat, the time the space was created.
This field is output only, except when used in import mode spaces. For
import mode spaces, set this field to the historical timestamp at which
the space was created in the source in order to preserve the original
creation time. Only populated in the output when spaceType is
GROUP_CHAT or SPACE.
Optional. Immutable.
Implementation
core.String? createTime;