private static void loadGhidraProtocolHandlers() {
		protocolHandlers = new ArrayList<>();
		List<Class<? extends GhidraProtocolHandler>> classes =
			ClassSearcher.getClasses(GhidraProtocolHandler.class);
		for (Class<?> c : classes) {
			try {
				protocolHandlers.add((GhidraProtocolHandler) c.newInstance());
			}
			catch (InstantiationException | IllegalAccessException e) {
				Msg.error(Handler.class,
					"Failed to instantiate ghidra protocol extension handler: " + c.getName());
			}
		}
	}
Determine if the specified url is supported and that any required 
protocol extensions are recognized.
@param url
@return true if support ghidra URL
Ghidra/Framework/Project/src/main/java/ghidra/framework/protocol/ghidra/Handler.java