'Whether this array\'s corresponding gradient array
(registered via `autograd.mark_variables`) has been
updated by `autograd.backward` since last reset.
`_fresh_grad` need to be manually set to False
after consuming gradient (usually after updating this
array).'

@property
def _fresh_grad(self):

    out = ctypes.c_int()
    check_call(_LIB.MXNDArrayGetGradState(self.handle, ctypes.byref(out)))
    return out.value
