human
Solve the following python programming problem given the following code:
def _get_ui_content(self, cli, width, height) : 
    '
        Create a `UIContent` instance.
        ' 
    def get_content() : 
        return self.content.create_content (cli, width = width, height = height) 
key = (cli.render_counter, width, height) 
    return self._ui_content_cache.get (width, get_content) 

    
    

    Fix the buggy line: return self._ui_content_cache.get (width, get_content)
assistant
#Here is Python code to fix the buggy line: return self.

return self._ui_content_cache.get (key, get_content)