Bug 65187 [Themes] Cascading*Registry leakage from Colors and Fonts pref page
Small leak on I20040529 For each ColorsAndFontsPreferencePage this is created, the cascading font and color registries are leaked. This is because the superclasses register a runnable with Display#disposeExec
bundles/org.eclipse.jface/src/org/eclipse/jface/resource/FontRegistry.java
return defaultFontData();
        return (FontData[]) result;
    }
    /**
     * Returns the font associated with the given symbolic font name.
     * Returns the default font if there is no special value associated
     * with that name.
     *
     * @param symbolicName symbolic font name
     * @return the font
     */
    public Font get(String symbolicName) {
        return getFontRecord(symbolicName).getBaseFont();
    }
    /**
     * Returns the bold font associated with the given symbolic font name.
     * Returns the bolded default font if there is no special value associated
     * with that name.
     *
     * @param symbolicName symbolic font name
     * @return the font
     * @since 3.0
     */
    public Font getBold(String symbolicName) {
        return getFontRecord(symbolicName).getBoldFont();
    }
    /**
     * Returns the italic font associated with the given symbolic font name.
     * Returns the italic default font if there is no special value associated
     * with that name.