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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def install_app(self, app_path, app_package):
 """ Install App via Appium Android only. - app_path - path to app - app_package - package of install app to verify """

        driver = self._current_application()
        driver.install_app(app_path)
        return driver.is_app_installed(app_package)