A filter for the state of the instances in the instance
group. Valid options are ALL or RUNNING. If you do not specify
this parameter the list includes all instances regardless of
their state.
Values:
UNDEFINED_INSTANCE_STATE (0):
A value indicating that the enum field is not
set.
ALL (64897):
Includes all instances in the generated list
regardless of their state.
RUNNING (121282975):
Includes instances in the generated list only
if they have a RUNNING state.