NewDynamic creates a DynamicGroup.

NewOrdered starts it's members in order, each member starting when the previous becomes ready.

NewParallel starts it's members simultaneously.

NewQueuedOrdered starts its members in order, each member starting when the previous becomes ready.

An EntranceEvent occurs every time an invoked member becomes ready.

ErrDuplicateNames is returned to indicate two or more members with the same name were detected.

An ExitEvent occurs every time an invoked member exits.

A Member associates a unique name with a Runner.

DynamicClient provides a client with group controls and event notifications.

A DynamicGroup begins empty, and runs members as they are inserted.

Members are treated as an ordered list.