code: public void enableCircuit(int circuitNumber) throws IllegalArgumentException {
          if (circuitNumber < 1 || circuitNumber > 31) {
              throw new IllegalArgumentException("Cicruit number is out of range[" + circuitNumber + "] <1,31>");
          }
  
          this.mapFormat |= _CIRCUIT_ENABLED << (circuitNumber - 1);
      }
docs: Enables circuit
  
  @param circuitNumber - index of circuit - must be number <1,31>
  @throws IllegalArgumentException - when number is not in range