Override/Add transitions

[Kayue Yeung]

Similar to #40, currently it is not possible to add new transitions to an existing graph.
However states is able to extend from pervious config.

Another question, when I try to extend an existing graph, I must define class, property_path and graph again. Is this an expected behaviour?

finite_finite:
    sylius_order_shipping:
        class:         %sylius.model.order.class%
        property_path: shippingState
        graph:         sylius_order_shipping

ping @winzou

[Alexandre Bacco]

Are you sure?
This is just symfony configuration. Transitions and states have names so it should be possible to override and add some.
But state/transition deletion is not possible indeed.

[Yohan Giarelli]

Seems weird as config is merged by symfony.