code: public function getScheme(): array
      {
          if (null === $this->scheme) {
              $raw = $this->medoo->query('DESCRIBE '.$this->getTable())->fetchAll();
              $this->scheme = [];
              foreach ($raw as $field) {
                  $this->scheme[$field['Field']] = $field;
              }
          }
  
          return $this->scheme;
      }
docs: Get entity scheme.
  
  @return array