The method setSerializer() does not exist on Symfony\Component\Serial...zer\NormalizerInterface. It seems like you code against a sub-type of Symfony\Component\Serial...zer\NormalizerInterface such as TgBotApi\BotApiBase\Norm...ObjectNormalizerWrapper or Symfony\Component\Serial...alizer\CustomNormalizer or Symfony\Component\Serial...izer\AbstractNormalizer.
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Ignorable by Annotation
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If this is a false-positive, you can also ignore this issue in your code via the ignore-call annotation