IMPL Object wrapper implementation and
The base class in the object hierarchy.
A weak reference to the object it was created for that can be sent to
different threads even for object types that don't implement
Marker trait for the statically known possibility of downcasting from
Upcasting and downcasting support.
Declares the "is a" relationship.
Trait for mapping a class struct type to its corresponding instance type.
Implemented by types representing
Unsafe variant of the