* Unique identifier for the target chat or username of the target channel
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* Required parameter
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*
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* @param string|integer $chat_id
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* @return $this
66
*/
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public function setChatId($chat_id)
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{
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$this->chat_id = $chat_id;
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return $this;
71
}
72
73
/**
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* Photo to send. Pass a file_id as String to send a photo that exists on the Telegram servers (recommended), pass an HTTP URL as a String for Telegram to get a photo from the Internet.