longDescription = """ Removes at-rules which have the same identifier as another; for example two instances of `@keyframes one`. As the browser will only count the *last* of these declarations, all others can safely be removed. """ inputExample = """ @keyframes one { 0% { opacity: 1; } to { opacity: 0; } } @keyframes one { 0% { transform: rotate(0deg); } to { transform: rotate(359deg); } } .box { animation-name: one; } """ outputExample = """ @keyframes one { 0% { transform: rotate(0deg); } to { transform: rotate(359deg); } } .box { animation-name: one; } """