/**
  * Add data to DB scheme
  * @return null;
  */
 public function run()
 {
     Abbreviation::truncate();
     Abbreviation::create(['code' => 'irap', 'acronym' => 'IRAP', 'meaning' => 'Imposta regionale sulle attività produttive', 'published' => true]);
     Abbreviation::create(['code' => 'caf', 'acronym' => 'CAF', 'meaning' => 'Centro Assistenza Fiscale', 'published' => true]);
     Abbreviation::create(['code' => 'rui', 'acronym' => 'RUI', 'meaning' => 'Registro Unico degli Intermediari', 'published' => true]);
     Abbreviation::create(['code' => 'vat', 'acronym' => 'IVA', 'meaning' => 'Imposta sul valore aggiunto', 'published' => true]);
 }
 /**
  * Return all the published abbreviations.
  * @return array
  */
 public function published()
 {
     return AbbreviationModel::published();
 }