@Override
	public boolean isReadOnly() throws NotConnectedException {
		if (statusCode == null) {
			throw new NotConnectedException("not connected");
		}
		return readOnly;
	}
Construct a protocol connector for use with a legacy Ghidra Server 
repository (RMI-based server)
@param ghidraURL Ghidra Server repository URL (ghidra://server/repo/...)
@throws MalformedURLException if URL is invalid
Ghidra/Framework/Project/src/main/java/ghidra/framework/protocol/ghidra/DefaultGhidraProtocolConnector.java