Mike42\Escpos\CapabilityProfile::getCodePages PHP Method

    public function getCodePages()
    {
        return $this->codePages;
    }

 /**
  * Switch character table (code page) manually. Used in conjunction with textRaw() to
  * print special characters which can't be encoded automatically.
  *
  * @param int $table The table to select. Available code tables are model-specific.
  */
 public function selectCharacterTable($table = 0)
 {
     self::validateInteger($table, 0, 255, __FUNCTION__);
     $supported = $this->profile->getCodePages();
     if (!isset($supported[$table])) {
         throw new InvalidArgumentException("There is no code table {$table} allowed by this printer's capability profile.");
     }
     $this->characterTable = $table;
     if ($this->profile->getSupportsStarCommands()) {
         /* Not an ESC/POS command: STAR printers stash all the extra code pages under a different command. */
         $this->connector->write(self::ESC . self::GS . "t" . chr($table));
         return;
     }
     $this->connector->write(self::ESC . "t" . chr($table));
 }