task
Nests a task group inside this one.
Return
The nested group.
Parameters
id
Group ID within this group; the nested group's ID is <group ID>.<id>. Must contain only ASCII letters, digits, underscores, or dashes.
Throws
if id is not a valid group ID, or the Dag already has a task or task group with the resulting ID. Also thrown if the resulting ID is the ID of a join node of this group, or if a task already has the ID of a join node of the nested group.