(self, ptr)
Given a pointer to a user payload, return the chunk associated with that payload.

        :param ptr: a pointer to the base of a user payload in the heap
        :returns: the associated heap chunk
Given a pointer to a user payload, return the chunk associated with that payload.
Given a pointer to a user payload return the chunk associated with that payload .
def chunk_from_mem(self, ptr):
        """
        Given a pointer to a user payload, return the chunk associated with that payload.

        :param ptr: a pointer to the base of a user payload in the heap
        :returns: the associated heap chunk
        """
        raise NotImplementedError("%s not implemented for %s" % (self.chunk_from_mem.__func__.__name__,
                                                                 self.__class__.__name__))
def chunk_from_mem ( self , ptr ) : raise NotImplementedError ( "%s not implemented for %s" % ( self . chunk_from_mem . __func__ . __name__ , self . __class__ . __name__ ) )