// 1. The string "@import" followed by a single SPACE (U+0020).
builder.append("@import "sv);
// 2. The result of performing serialize a URL on the rule’s location.
// FIXME: Look into the correctness of this serialization
builder.append("url("sv);
builder.append(m_url.to_string());
builder.append(')');
// FIXME: 3. If the rule’s associated media list is not empty, a single SPACE (U+0020) followed by the result of performing serialize a media query list on the media list.