ListItemBuilder constructor Null safety

ListItemBuilder()

1. unself_component
2. unself_component
3. ListItemBuilder
4. ListItemBuilder constructor

ListItemBuilder class

1. Constructors
2. ListItemBuilder
3. Properties
4. hashCode
5. runtimeType
6. Methods
7. noSuchMethod
8. toString
9. Operators
10. operator ==
11. Static methods
12. section
13. tile