A utility node which can be used for organising large graphs.
Container for user-defined plugs. Nodes should never make their own plugs here, so users are free to do as they wish.
The method used to apply an optional label to the dot. Using a node name is recommended, because it encourages the use of descriptive node names, and updates automatically when nodes are renamed or upstream connections change. The custom label does however provide more flexibility, since node names are restricted in the characters they can use.
The label displayed when the type is set to custom.