public PluginTool launchDefaultTool() {

		if (tool != null) {
			Msg.error(this, "Tool already exists--you are doing something wrong!");
		}

		tool = launchDefaultToolByName(AbstractGenericTest.DEFAULT_TEST_TOOL_NAME);
		if (tool == null) {
			throw new NullPointerException(
				"Unable to launch the default tool: " + AbstractGenericTest.DEFAULT_TEST_TOOL_NAME);
		}

		return tool;
	}
Launches the default tool of the test system ("CodeBrowser").
This method will load the tool from resources and <b>not from the
user's Ghidra settings</b>.
<p>
<b>Note:</b> Calling this method also changes the tool that this
instance of the TestEnv is using, which is the reason for the existence
of this method.
@return the tool that is launched
Ghidra/Features/Base/src/main/java/ghidra/test/TestEnv.java