public HashSet <long?> LookupIngredientLevel(long conceptId)
{
if (conceptId == 0 || ingredientLevel == null)
{
return new HashSet <long?> {
conceptId
}
}
;
var ingredientLevelConceptIds = ingredientLevel.MultiLookupValue(conceptId.ToString(), null, false).ToList();
if (ingredientLevelConceptIds.Count == 1 && ingredientLevelConceptIds[0].ConceptId == 0)
{
return(new HashSet <long?> {
conceptId
});
}
return(ingredientLevelConceptIds.Select(i => i.ConceptId).ToHashSet());
}
