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...)

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.

Wrap a diagram, exposing the free in and out ports

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

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...)