Javadoc
Checks whether this skin is valid. A valid skin must have a color scheme
bundle for
DecorationAreaType#NONE and non-null
button shaper, gradient painter, border painter, highlight painter and
decoration painter. If call to
SubstanceLookAndFeel#setSkin(String) or
SubstanceLookAndFeel#setSkin(SubstanceSkin) does not seem to have
any visible effect (returning false
), call this method to
verify that your skin is valid.