CSSDeclarationImpl::GetValueIsImportant(const nsString& aProperty,
CSSDeclarationImpl::GetValueIsImportant(const nsAReadableString& aProperty,
CSSDeclarationImpl::GetValueIsImportant(const nsString& aProperty,                                        PRBool& aIsImportant){  nsCSSProperty propID = nsCSSProps::LookupProperty(aProperty);  return GetValueIsImportant(propID, aIsImportant);}