<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 text(self) -> str: """Return BODY as text using encoding from .charset."""

        bytes_body = await self.read()
        encoding = self.charset or 'utf-8'
        return bytes_body.decode(encoding)