Javadoc
Looks at all service items that match the specified template, finds every entry (among those
service items) that matches tmpl.attributeSetTemplates[setIndex], and returns the set of
values of the specified field of those entries. Duplicate values are eliminated, and the
order of values within the returned array is arbitrary. Null (not an empty array) is
returned if there are no matching items. If a returned value cannot be deserialized, that
element of the returned array is set to null and no exception is thrown.