45 duplicated lines in:
  - modules/closure/backdrop/backdrop.css (7:51, 100%)
  - modules/js/backdrop/backdrop.css (7:51, 100%)

36 duplicated lines in:
  - modules/closure/backdrop/backdrop.js (28:91, 92%)
  - modules/js/backdrop/backdrop.js (29:92, 92%)

6 duplicated lines in:
  - modules/closure/backdrop/backdrop-default-theme.css (7:12, 100%)
  - modules/js/backdrop/backdrop-default-theme.css (7:12, 100%)