def _is_picture(self, shape: Any) -> bool:
        """Check if a shape is a picture.

        Args:
            shape: Shape object to check

        Returns:
            True if the shape is a picture, False otherwise
        """
        if shape.shape_type == MSO_SHAPE_TYPE.PICTURE:
            return True
        if shape.shape_type == MSO_SHAPE_TYPE.PLACEHOLDER:
            if hasattr(shape, "image"):
                return True
        return False
Check if a shape is a picture.

        Args:
            shape: Shape object to check

        Returns:
            True if the shape is a picture, False otherwise
        
backend/airweave/platform/file_handling/conversion/converters/pptx_converter.py