Add a previously defined task and its sub-tasks to this task. This can be used to create virtual projects that contain task (sub-)trees that are originally defined in another task context. Adopted tasks don't inherit anything from their step parents. However, the adopting task is scheduled to fit all adopted sub-tasks.

A top-level task and all its sub-tasks must never contain the same task more than once. All reports must use appropriate filters by setting taskroot, hidetask or rolluptask to ensure that no tasks are contained more than once in the report.