Unable to create a multi-head model

[coomish]

So I was wondering if its possible to visualize a multihead model [1], as I can only define one Input.
Is there anything i missed out?

[1] https://3qeqpr26caki16dnhd19sv6by6v-wpengine.netdna-ssl.com/wp-content/uploads/2018/07/Plot-of-the-Multi-Headed-1D-Convolutional-Neural-Network.png

[yu4u]

Sorry, but currently only sequential model is supported.