EmpireValue<T> constructor Null safety

1. empire
2. empire_property
3. EmpireValue<T>
4. EmpireValue constructor

EmpireValue class

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