public SDVariable sequenceMask(String name, SDVariable lengths, int maxLen, DataType dataType) {
    SDValidation.validateNumerical("sequenceMask", "lengths", lengths);
    SDVariable out =  new org.nd4j.linalg.api.ops.impl.shape.SequenceMask(sd,lengths, maxLen, dataType).outputVariable();
    return sd.updateVariableNameAndReference(out, name);
  }