This object indicates whether coIfDwdmChannelGroupBitmap
identifies channels included in the channel group, or whether
it identifies channels excluded from the channel group.
When the value of this object is 'carried', then the channel
group is composed only of those channels for which the value of
the corresponding bit in coIfDwdmChannelBitmap is one.
When the value of this object is 'blocked', then the channel
group is composed of all channels except those for which the
value of the corresponding bit in coIfDwdmChannelBitmap is
one. Channels that are not identified in coIfDwdmChannelBitmap
are included in the channel group.