code: public SDVariable normalTruncated(String name, double mean, double stddev, long... shape) {
          SDVariable ret = f().randomNormalTruncated(mean, stddev, shape);
          return updateVariableNameAndReference(ret, name);
      }
docs: Generate a new random SDVariable, where values are randomly sampled according to a Gaussian (normal) distribution,
  N(mean, stdev). However, any values more than 1 standard deviation from the mean are dropped and re-sampled<br>
  
  @param name   Name of the new SDVariable
  @param mean   Mean value for the random array
  @param stddev Standard deviation for the random array
  @param shape  Shape of the new random SDVariable
  @return New SDVariable