code: private function defaultTimeTypeMap()
      {
          $map = [
              Schema::TYPE_DATETIME => 'datetime',
              Schema::TYPE_TIMESTAMP => 'timestamp',
              Schema::TYPE_TIME => 'time',
          ];
  
          if ($this->supportsFractionalSeconds()) {
              $map = [
                  Schema::TYPE_DATETIME => 'datetime(0)',
                  Schema::TYPE_TIMESTAMP => 'timestamp(0)',
                  Schema::TYPE_TIME => 'time(0)',
              ];
          }
  
          return $map;
      }
docs: Returns the map for default time type.
  If the version of MySQL is lower than 5.6.4, then the types will be without fractional seconds,
  otherwise with fractional seconds.
  
  @return array