This implementation exposes methods to retrieve the backing pb.Computation,
as well as the Python representation of this protocol buffer represented by
an instance of building_blocks.ComputationBuildingBlock. Leverages the
implementation of __call__ inherited from function_utils.ConcreteFunction
to pass self to the currently installed context.
The protocol buffer that represents the computation, an
instance of pb.Computation.
The context stack to use.
Optional, type information with additional annotations
that replaces the information in computation_proto.type.
if annotated_type is not None and is not compatible with
Returns the TFF type of this object (an instance of tff.Type).