code: public List<A> findAllAttributesByQualifier(String qualifier) {
          return (List<A>)getModelStore().findAllAttributesByQualifier(qualifier);
      }
docs: Returns a {@code List} of all attributes that share the same qualifier.<br/>
  Never returns null. The returned {@code List} is immutable.
  
  @return a {@code List} of all attributes for which their qualifier was a match.