Note: Expects Compressor Block like objects

def do_heavy_work(self, block):
        """
        Note: Expects Compressor Block like objects
        """
        src_file_path = block.latest_file_info.path
        img_path = src_file_path + self.get_extension()
        self.log.debug("Converting file '%s' to image '%s'", src_file_path, img_path)
        from_file_to_image(src_file_path, img_path)
        block.image_converted_file_info = FileInfo(img_path)
        block.latest_file_info = block.image_converted_file_info
        return block