public void setIsNumbered(boolean numberedWanted) {
        this.numbered = numberedWanted;
    }
Sets if the filename should be appended with a number representing the
current sequence.
@param numberedWanted If numbering is wanted.
jme3-screenshot-tests/src/main/java/org/jmonkeyengine/screenshottests/testframework/ScreenshotNoInputAppState.java