code: public boolean isRangeSet() {
  		for (int i = 0; i < getDimensions(); i++) {
  			if( valueMin[i] == 0 && valueMax[i] == 0 ) {
  				return false;
  			}
  		}
  
  		return true;
  	}
docs: Returns true if the min and max value for each dimension has been set
  @return true if range has been set