SemigroupSumDouble constructor

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

SemigroupSumDouble class

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