CloseClient finalizes the runtime process, signalling the end of the execution to the jsii kernel process, and waiting for graceful termination.

GetClient returns a singleton Client instance, initializing one the first time it is called.

The Client struct owns the jsii child process and its io interfaces.

TODO extends AnnotatedObjRef?.

LoadProps holds the necessary information to load a library into the @jsii/kernel process through the Load method.

LoadResponse contains the data returned by the @jsii/kernel process in response to a load request.