@Override
    public int getArgb(final float f) {
        if (isNull && Float.isNaN(f)) {
            return iColor;
        }
        if (f == value) {
            return iColor;
        }
        return 0;
    }
Constructs a palette entry for a single value.
<p>
This class will support color-assignments for Float.NaN.

@param value the color value associated with this palette entry; a Float&#46;NaN is allowed.
@param color the color assigned to value
src/main/java/org/apache/commons/imaging/formats/tiff/photometricinterpreters/floatingpoint/PaletteEntryForValue.java