1. Dart
2. dart:html
3. StylePropertyMapReadonly
4. getProperties method

StylePropertyMapReadonly class

1. Properties
2. hashCode
3. runtimeType
4. Methods
5. get
6. getAll
7. getProperties
8. has
9. noSuchMethod
10. toString
11. Operators
12. operator ==

List<String> getProperties() native;