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my $label_formatting = $button->child->font_style;

$window->title('foo')->border(20);

eval {$window->title('foo')->border(20)};
if ($@) {...do something...}

eval {$window->title('foo')};
if ($@) {....}
else {eval {$window->border(20)}
      if ($@) {....}}

$obj->foo($obj->bar($baz))