MonoidSumDouble constructor

1. func_dart_core
2. double
3. MonoidSumDouble
4. MonoidSumDouble constructor

MonoidSumDouble class

1. Constructors
2. MonoidSumDouble
3. Properties
4. empty
5. hashCode
6. runtimeType
7. Methods
8. concat
9. noSuchMethod
10. toString
11. Operators
12. operator ==