* @method string getText() Label text on the button
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* @method WebAppInfo getWebApp() Optional. Description of the Web App that will be launched when the user presses the button. The Web App will be able to switch back to the inline mode using the method switchInlineQuery inside the Web App.
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* @method string getStartParameter() Optional. Deep-linking parameter for the /start message sent to the bot when a user presses the button. 1-64 characters, only A-Z, a-z, 0-9, _ and - are allowed.