docs: public void setColorInterpolated(int index, int firstIndex, int lastIndex, int color) {
  		int firstColor = map[firstIndex];
  		int lastColor = map[lastIndex];
  		for (int i = firstIndex; i <= index; i++)
  			map[i] = ImageMath.mixColors((float)(i-firstIndex)/(index-firstIndex), firstColor, color);
  		for (int i = index; i < lastIndex; i++)
  			map[i] = ImageMath.mixColors((float)(i-index)/(lastIndex-index), color, lastColor);
  	}