OSID - osid.Containable Service Interface Definition

Interface	osid.Containable
Implemented By	`osid.assessment.authoring.AssessmentPart`
	`osid.forum.Reply`
	`osid.OsidNode`
	`osid.repository.Composition`
	`osid.course.requisite.Requisite`
	`osid.calendaring.Event`
	`osid.calendaring.RecurringEvent`
	`osid.calendaring.ScheduleSlot`
	`osid.checklist.Todo`
Description	A `Containable` is a kind of aggregate where an `OsidObject` is defined as a recursive composition of itself directly accessible without knowledge of the originating service. `Containables` are rare because of the fulfillment of a recursive retrieval of OSID `Ids`. They are used only when independent references to a single container without its contained parts have no purpose and generic hierarchy services do not capture the meaning of the hierarchical structure. Because of the hierarchical nature of `Containables`, sub-objects may be created for the sole purpose of creating the aggregate. It may be desirable to hide these building blocks from general view.
Method	isSequestered
Description	Tests if this `Containable` is sequestered in that it should not appear outside of its aggregated composition.
Return	`boolean`	`true` if this containable is sequestered, `false` if this containable may appear outside its aggregate
Compliance	`mandatory`	This method must be implemented.