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foo {
$id: unique-id();
$is-string: type-of($id) == string;
$starts-with-character: str_slice($id, 0, 1) == "u";
$is-unique: $id != unique-id();
@for $i from 1 through 1000 {
$id: unique-id();
$is-string: $is-string and type-of($id) == string;
$starts-with-character: $starts-with-character and str_slice($id, 0, 1) == "u";
$is-unique: $is-unique and $id != unique-id();
}
is-defined: $id != "unique-id()";
is-string: $is-string;
starts-with-character: $starts-with-character;
is-unique: $is-unique;
}
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