@Override
    public void read(JmeImporter im) throws IOException {
        InputCapsule ic = im.getCapsule(this);
        charSet = (BitmapCharacterSet) ic.readSavable("charSet", null);
        Savable[] pagesSavable = ic.readSavableArray("pages", null);
        pages = new Material[pagesSavable.length];
        System.arraycopy(pagesSavable, 0, pages, 0, pages.length);
        rightToLeft = ic.readBoolean("rightToLeft", false);
        glyphParser = (GlyphParser) ic.readSavable("glyphParser", null);
    }
Gets the line height of a StringBlock.

@param sb the block to measure (not null, unaffected)
@return the line height
jme3-core/src/main/java/com/jme3/font/BitmapFont.java