* @method string getData() The data. Be aware that a bad client can send arbitrary data in this field.
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* @method string getButtonText() Text of the web_app keyboard button, from which the Web App was opened. Be aware that a bad client can send arbitrary data in this field.
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*
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* @method User getUser() (Optional). The user who sent the query.
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* @method string getHash() (Optional). Unique identifier for the validating