IsOperatorAlwaysManaged means the operator can't be set to unmanaged state.

IsOperatorManaged indicates whether the operator management state allows the control loop to proceed and manage the operand.

IsOperatorNotRemovable means the operator can't be set to removed state.

IsOperatorRemovable means the operator can be set to removed state.

SetOperatorAlwaysManaged is one time choice when an operator want to opt-out from supporting the "unmanaged" state.

SetOperatorNotRemovable is one time choice the operator author can make to indicate the operator does not support removing of his operand.

SetOperatorRemovable is one time choice the operator author can make to indicate the operator supports removing of his operand.

SetOperatorUnmanageable is one time choice when an operator wants to support the "unmanaged" state.