code: public SDVariable assign(String name, SDVariable in, Number value) {
          SDVariable ret = f().assign(in, value);
          return updateVariableNameAndReference(ret, name);
      }
docs: Return an array with equal shape to the input, but all elements set to 'value'
  
  @param name  Name of the output variable
  @param in    Input variable
  @param value Value to set
  @return Output variable