ToolBarUtils constructor Null safety

1. baguette
2. ToolBarUtils
3. ToolBarUtils
4. ToolBarUtils constructor

ToolBarUtils class

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