prefer_generic_function_type_aliases
Use the generic function type syntax in 'typedef's.
Description
#The analyzer produces this diagnostic when a typedef is written using the older syntax for function type aliases in which the name being declared is embedded in the function type.
Example
#The following code produces this diagnostic because it uses the older syntax:
dart
typedef void F<T>();
Common fixes
#Rewrite the typedef to use the newer syntax:
dart
typedef F<T> = void Function();