static private String createName(DataType nested, boolean createIfNonExistent, boolean removeIfZero) {
        if (nested == DataType.STRING && createIfNonExistent && removeIfZero) {
            return "tag";
        } else {
            String name = "WeightedSet<" + nested.getName() + ">";
            if (createIfNonExistent) name += ";Add";
            if (removeIfZero) name += ";Remove";
            return name;
        }
    }
Returns whether or not this is a <em>tag</em> type weighted set.

@return true if this is a tag set.
document/src/main/java/com/yahoo/document/WeightedSetDataType.java