Saving rossmann Keras 2 model

Hi I need some help to save model. How in keras 2 should i save model with custom initializer?
I wanna save this network with but when i load model i get “Unknown initializer: emb_init”.
I tried setattr(initializers, ‘emb_init’, emb_init) but then i got “emb_init() missing 1 required positional argument: ‘shape’”