code: public int process() {
  		// Calculate the result of the left operation if any
  		if (leftOperation != null) {
  			leftOperand = leftOperation.process();
  		}
  
  		// Calculate the result of the right operation if any
  		if (rightOperation != null) {
  			rightOperand = rightOperation.process();
  		}
  
  		// Process the operation itself after the composition resolution
  		return calculate();
  	}
docs: Process the operation and take care about the composition of the operations
  
  @return The result of all the operation