code: public SDVariable biasAdd(String name, SDVariable input, SDVariable bias) {
          validateFloatingPoint("biasAdd", "input", input);
          validateFloatingPoint("biasAdd", "bias", bias);
          SDVariable ret = f().biasAdd(input, bias);
          return updateVariableNameAndReference(ret, name);
      }
docs: Bias addition operation: a special case of addition, typically used with CNN 4D activations and a 1D bias vector
  
  @param name  Name of the output variable
  @param input 4d input variable
  @param bias  1d bias
  @return Output variable