user/test/com/google/gwt/resources/converter/multiple_declarations.gss

pre {
  white-space: pre-wrap;
  /* @alternate */ white-space: -moz-pre-wrap;
  /* @alternate */ white-space: -pre-wrap;
  /* @alternate */ white-space: -o-pre-wrap;
  word-wrap: break-word;
}

.foo {
  gwt-sprite: "bar";
  height: 10px;
  /* @alternate */ height: 20px;
}