@Override
	public List<CodeCompletion> getCompletions(String cmd) {
		return getCompletions(cmd, cmd.length());
	}
Returns a list of possible command completion values.

@param cmd current command line (without prompt)
@return A list of possible command completion values.  Could be empty if there aren't any.
Ghidra/Features/Jython/src/main/java/ghidra/jython/JythonPlugin.java