code: public String [] availableFlags(){
  		Iterator<String> it = flags.keySet().iterator();
  		String [] out = new String[(flags.keySet().size())];
  		int i = 0;
  		while(it.hasNext()){
  			out[i] = it.next();
  			i++;
  		}
  		return out;
  	}
docs: Returns an array with the available flags in the report.
  If the array's lenght is 0, there are none.
  For more information refer to the API Docs:
  <a href="https://developer.forecast.io">https://developer.forecast.io</a>
  @return A String array with the available flags.