* @method string getFileId() Identifier for this file, which can be used to download or reuse the file
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* @method string getFileUniqueId() Unique identifier for this file, which is supposed to be the same over time and for different bots. Can't be used to download or reuse the file.
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* @method PhotoSize getThumbnail() Optional. Document thumbnail as defined by sender
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* @method string getFileName() Optional. Original filename as defined by sender
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* @method string getMimeType() Optional. MIME type of the file as defined by sender