<SYSTEM_TASK:>
Solve the following problem using Python, implementing the functions described below, one line at a time
<END_TASK>
<USER_TASK:>
Description:
 def fetch_partial(self, container, obj, size):
 """ Returns the first 'size' bytes of an object. If the object is smaller than the specified 'size' value, the entire object is returned. """

        return self._manager.fetch_partial(container, obj, size)