/**
  * Method used for creating new DB table column.
  *
  * @param  \CsvMigrations\FieldHandlers\DbField $dbField DbField object
  * @return void
  */
 protected function _createColumn(DbField $dbField)
 {
     $this->_table->addColumn($dbField->getName(), $dbField->getType(), $dbField->getOptions());
     // set field as unique
     if ($dbField->getUnique()) {
         $this->_table->addIndex([$dbField->getName()], ['unique' => $dbField->getUnique()]);
     }
     // set id as primary key
     if ('id' === $dbField->getName()) {
         $this->_table->addPrimaryKey([$dbField->getName()]);
     }
 }