(self, y, t)
Args:
            y (Tensor or OpTree): Output of previous layer or model
            t (Tensor or OpTree): True targets corresponding to y

        Returns:
            float: Returns the metric
Args:
            y (Tensor or OpTree): Output of previous layer or model
            t (Tensor or OpTree): True targets corresponding to y
Args : y ( Tensor or OpTree ) : Output of previous layer or model t ( Tensor or OpTree ) : True targets corresponding to y
def __call__(self, y, t):
        """
        Args:
            y (Tensor or OpTree): Output of previous layer or model
            t (Tensor or OpTree): True targets corresponding to y

        Returns:
            float: Returns the metric
        """
        raise NotImplementedError()
def __call__ ( self , y , t ) : raise NotImplementedError ( )