MethodDefinitionMacro constructor Null safety

1. macro_builder
2. definition
3. MethodDefinitionMacro
4. MethodDefinitionMacro constructor

MethodDefinitionMacro class

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