code: public float ENgetnodevalue( int index, NodeParameters code ) throws EpanetException {
          float[] nodeValue = new float[1];
          int error = epanet.ENgetnodevalue(index, code.getCode(), nodeValue);
          checkError(error);
          return nodeValue[0];
      }
docs: Retrieves the value of a specific link (node?) parameter.
  
  @param index the node index.
  @param code the parameter code.
  @return the value at the node.
  @throws EpanetException