       1mkeylset 4m22mlistvar24m 4mkey24m 4mvalue24m ?4mkey224m 4mvalue224m ...?
              Set  the  value associated with 4mkey24m, in the keyed list contained
              in the variable 4mlistvar24m, to 4mvalue24m.  If listvar does not  exists,
              it  is created.  If 4mkey24m is not currently in the list, it will be
              added.  If it already exists, 4mvalue24m replaces the existing value.
              Multiple keywords and values may be specified, if desired.
