result.Assign(aURI); result.Append(nsSOAPUtils::kEncodingSeparator); result.Append(aType);
result = aURI + gSOAPStrings->kEncodingSeparator + aType;
SOAPEncodingKey(const nsAString & aURI, const nsAString & aType,                nsAString & result){  result.Assign(aURI);  result.Append(nsSOAPUtils::kEncodingSeparator);  result.Append(aType);}