<SYSTEM_TASK:>
Solve the following problem using Python, implementing the functions described below, one line at a time
<END_TASK>
<USER_TASK:>
Description:
 def dumps(data):
 # type: (_TOMLDocument) -> str """ Dumps a TOMLDocument into a string. """

    if not isinstance(data, _TOMLDocument) and isinstance(data, dict):
        data = item(data)

    return data.as_string()