Represent an abstract wire-diagram.

Think of boxes connected with ports, that can be inside other boxes (which connect outside) (TODO illustration)

Initialize an empty Diagram. The idea is a box with no label. The box is abstract and will be given geometry using the Layout module

Use modifiers like setInPorts to configure further

Initialize an empty Diagram with a label of a chosen type

All diagrams you intend to combine needs to have the same label type

Wrap a diagram, exposing the free in and out ports

Make a source with label a and a number of outPorts

Make a sink with label a and a number of inPorts

Make a relation with label a and a number of inPorts and outPorts

Connect diagrams in a chain

Put diagrams in paralell. No connections will be made. (We probably need to relabel ports here...)

Assign a label to a Diagram

setLabel (Just "node") <| diagram --

Say which direction the children should lay out

Direction of composition of diagrams

D1 is horizontal (sequenced, chained) D2 is vertical (in paralell)

Include a list of diagrams inside another diagram. The included list will replace any previous innards.

Assign output ports to a Diagram

Assign input ports to a Diagram

Extract the output ports of a Diagram

Extract the input ports of a Diagram

Wrap a diagram, exposing the free in and out ports

Specify that a diagram exterior is significant

Map a function over a diagram innards You should avoid using this

Ports are a list of numbers identifying each port

Bump the port numbers of a diagram.

This is used to avoid duplicate ports when combining diagrams in paralell (relabel ports here...)