@pragma('dart2js:tryInline') String getAttributeNS(String namespaceURI, String name) { // Protect [name] against string conversion to "null" or "undefined". // [namespaceURI] does not need protecting, both `null` and `undefined` map to `null`. assert(name != null, 'Attribute name cannot be null'); return _getAttributeNS(namespaceURI, name); }
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https://api.dart.dev/stable/2.5.0/dart-html/Element/getAttributeNS.html