void shutdown() {
		try {
			shutdownRequested.set(true);
			consoleStdin.close();
		}
		catch (IOException e) {
			// shouldn't happen, ignore
		}
	}
Causes the background thread's run() loop to exit.
<p>
Causes background thread's exit by closing the inputstream it is looping on.
Ghidra/Features/Jython/src/main/java/ghidra/jython/JythonPluginInputThread.java