.abstractmethod: |F <: GenericCallable|(F) -> F
.abstractclassmethod: |F <: GenericCallable|(F) -> F
.abstractstaticmethod: |F <: GenericCallable|(F) -> F

.ABCMeta: ClassType
.ABCMeta <: Type
.ABCMeta.
    __instancecheck__: (self: .ABCMeta, instance: Obj) -> Bool
    __subclasscheck__: (self: .ABCMeta, subclass: Type) -> Bool
    __subclasshook__: (self: .ABCMeta, subclass: Type) -> Bool
    register: (self: .ABCMeta, subclass: Type) -> NoneType

.ABC: ClassType