docs: public static String getSourcePath(String pkg, String app) {
  		String path = "";
  		if(pkg == null || app == null)
  			return path;
  
  
  		String pathToBase = getPathToBase();
  		if( pathToBase != null ) {
  			if(pkg.contains("examples"))
  				path =  new File(pathToBase,"examples/src/main/java/").getAbsolutePath();
  			else if(pkg.contains("demonstrations"))
  				path =  new File(pathToBase,"demonstrations/src/main/java/").getAbsolutePath();
  			else {
  				System.err.println("pkg must be to examples or demonstrations. " + pkg);
  				return path;
  			}
  			String pathToCode = pkg.replace('.','/') + "/" + app + ".java";
  			return new File(path,pathToCode).getPath();
  		} else {
  			// probably running inside a jar
  			String pathToCode = pkg.replace('.','/') + "/" + app + ".java";
  			URL url = UtilIO.class.getClassLoader().getResource(pathToCode);
  			if( url != null )
  				return url.toString();
  			else
  				return pathToCode;
  		}
  	}