code: public void ENsettimeparam( TimeParameterCodes code, Long timevalue ) throws EpanetException {
          int errcode = epanet.ENsettimeparam(code.getCode(), timevalue);
          checkError(errcode);
      }
docs: Sets the value of a time parameter.
  
  @param paramcode the {@link TimeParameterCodes}.
  @param timevalue value of time parameter in seconds.
  @throws EpanetException