private boolean validate() {
		String title = "Invalid Ghidra Module Extension";
		IJavaProject javaProject = projectPage.getGhidraModuleProject();
		if (!javaProject.getProject().getFile("extension.properties").exists()) {
			EclipseMessageUtils.showErrorDialog(title,
				"Cannot export extension because 'extension.properties' file does not exist.");
			return false;
		}
		if (!javaProject.getProject().getFile("Module.manifest").exists()) {
			EclipseMessageUtils.showErrorDialog(title,
				"Cannot export extension because 'Module.manifest' file does not exist.");
			return false;
		}
		return true;
	}
Validates the wizard pages.  If they are invalid, an error popup will be displayed which
will indicate the problem.

@return True if the data returned from the wizard pages are valid; otherwise, false
GhidraBuild/EclipsePlugins/GhidraDev/GhidraDevPlugin/src/main/java/ghidradev/ghidraprojectcreator/wizards/ExportGhidraModuleWizard.java