<SYSTEM_TASK:>
Solve the following problem using Python, implementing the functions described below, one line at a time
<END_TASK>
<USER_TASK:>
Description:
 async def send_document(self, path, entity):
 """Sends the file located at path to the desired entity as a document"""

        await self.send_file(
            entity, path,
            force_document=True,
            progress_callback=self.upload_progress_callback
        )
        print('Document sent!')