if (this.useTruncatedBPTT && this.truncatedBPTT > 0)
            listBuilder.backpropType(BackpropType.TruncatedBPTT).tBPTTForwardLength(truncatedBPTT)
                    .tBPTTBackwardLength(truncatedBPTT);
        else
            listBuilder.backpropType(BackpropType.Standard);