questionConcept = HtmlFormEntryUtil.getConcept(questionConceptId);
if (questionConcept == null)
throw new IllegalArgumentException("Cannot find concept for value " + questionConceptId
+ " in conceptId attribute value. Parameters: " + parameters);
Concept c = null;
Obs o = context.removeExistingObs(questionConcept, c);
if (o != null)
existingObs = Context.getObsService().getComplexObs(o.getId(), "");
}