Internally, this calls a class function that should be registered
by the IPC layer (usually at-spi2-atk). The implementor of an
atk.Plug object should call this function (after atk-bridge is
loaded) and pass the value to the process implementing the
atk.Socket, so it could embed the plug.
Gets the unique ID of an atk.Plug object, which can be used to embed inside of an atk.Socket using Socket.embed.
Internally, this calls a class function that should be registered by the IPC layer (usually at-spi2-atk). The implementor of an atk.Plug object should call this function (after atk-bridge is loaded) and pass the value to the process implementing the atk.Socket, so it could embed the plug.