A grouping for tasks. The editor by default supports the 'Clean', 'Build', 'RebuildAll' and 'Test' group.
The clean task group;
The build task group;
The rebuild all task group;
The test all task group;
Whether the task that is part of this group is the default for the group. This property cannot be set through API, and is controlled by a user's task configurations.
The ID of the task group. Is one of TaskGroup.Clean.id, TaskGroup.Build.id, TaskGroup.Rebuild.id, or TaskGroup.Test.id.