/**
  * @param phpMorphy_Paradigm_ParadigmInterface $paradigm
  * @param string $base
  * @param string $additionalCommonPrefix
  * @return phpMorphy_Dict_Lemma
  */
 protected function createLemma(phpMorphy_Paradigm_ParadigmInterface $paradigm)
 {
     $flexia_model = $this->createFlexiaModel($paradigm);
     $base = $paradigm->getPseudoRoot();
     $common_prefix = $paradigm[0]->getCommonPrefix();
     $lemma = new phpMorphy_Dict_Lemma($base, $flexia_model->getId(), null);
     if (strlen($common_prefix)) {
         $prefix_set = new phpMorphy_Dict_PrefixSet(null);
         $prefix_set->append($common_prefix);
         $prefix_set_id = $this->source->appendPrefix($prefix_set)->getId();
         $lemma->setPrefixId($prefix_set_id);
     }
     if (count($paradigm->getCommonGrammems())) {
         $common_ancode = $this->createAncode(null, $paradigm->getCommonGrammems());
         $lemma->setAncodeId($common_ancode->getId());
     }
     return $this->source->appendLemma($lemma);
 }