Do not use: Internal object to used by ProviderContainer/
to override the behavior of a "family" for part of the application.
Invocation invocation) → dynamic
Invoked when a non-existent method or property is accessed. [...]
Arg argument, SetupOverride setup) → void
- Allows a family to override all the different providers associated with an argument.
) → String
A string representation of this object. [...]