The countByTargetCriterionRequest element cannot have "xsi:nil" as an attribute.
The countByTargetCriterionRequest element in XML instance can be substituted with other elements.
XML Instance
This request counts the number of
notifications matching the supplied criteria.
If provided, only a maximum of resultsLimit
notifications will be counted.
Please see the findByTargetCriterionRequest
type for more details.