public void setLocale(String value) {
        verifyThat(sortLocale == null, "sorting already has locale", sortLocale);
        this.sortLocale = value;
    }
This class holds the extracted information after parsing a "sorting"
block, using simple data structures as far as possible.  Do not put
advanced logic here!
@author arnej27959
config-model/src/main/java/com/yahoo/schema/parser/ParsedSorting.java