&& getJarLocation() != null
&& getAbsoluteJarLocation() != null
	public boolean isValid() {		return (areClassFilesExported() || areJavaFilesExported())			&& getElements() != null && getElements().length > 0			&& getJarLocation() != null			&& isManifestAccessible()			&& isMainClassValid(new BusyIndicatorRunnableContext());	}