<SYSTEM_TASK:>
Solve the following problem using Python, implementing the functions described below, one line at a time
<END_TASK>
<USER_TASK:>
Description:
 def json(self, **kwargs):
 """Decodes response as JSON."""

        encoding = detect_encoding(self.content[:4])
        value = self.content.decode(encoding)

        return simplejson.loads(value, **kwargs)