protected static HashMap getWthData(HashMap data) {
        if (data.containsKey("weather")) {
            return getObjectOr(data, "weather", new HashMap());
        } else {
            return data;
        }
    }
protected static HashMap getWthData ( HashMap data ) { if ( data . containsKey ( "weather" ) ) { return getObjectOr ( data , "weather" , new HashMap ( ) ) ; } else { return data ; } }
Get weather station data set from data holder.

@param data The experiment data holder
@return The weather station data set