add method to instantiate new Model dynamically
add method to instantiate new Model dynamically

hsaputra/DDF,ubolonton/DDF,milliondreams/ddf-with-flink,ddf-project/DDF,phvu/DDF,ddf-project/DDF,hsaputra/DDF,ubolonton/DDF,phvu/DDF,hsaputra/DDF,ddf-project/DDF,ddf-project/ddf-flink,ddf-project/DDF,ddf-project/ddf-flink,hsaputra/DDF,milliondreams/ddf-with-flink,ddf-project/DDF,phvu/DDF,ubolonton/DDF,phvu/DDF,ubolonton/DDF,phvu/DDF,hsaputra/DDF,ubolonton/DDF