||The secondary virtual machine specified will be terminated, allowing
fault tolerance to activate. If no virtual machine is specified,
all secondary virtual machines will be terminated. If vm is a
primary, InvalidArgument exception is thrown.
This field must specify a virtual machine that is part of the fault
tolerant group that this virtual machine is currently associated with. It can
only be invoked from the primary virtual machine in the group. If the primary
virtual machine is terminated, an available secondary virtual machine will be
promoted to primary. If no secondary exists, an exception will be thrown and
the primary virtual machine will not be terminated. If a secondary virtual
machine is terminated, it may be respawned on a potentially different host.