code: public String getString(String nameOfField, String defaultValue) {
  		String value = (String) stringData.get(nameOfField);
  		
  		if (value == null) {
  			return defaultValue;
  		}
  		
  		return value;
  	}
docs: Get the String at the given location
  
  @param nameOfField location of string
  @param defaultValue The value to return if the specified value hasn't been set
  @return String stored at the location given