A constant describing a layer consisting mainly of label nodes or dummy nodes.
Describes a layer below a group to store the connector proxies where edges connect to groups.
A constant describing a normal layer consisting mainly of normal nodes.
A constant describing a layer consisting of source group nodes and dummy nodes.
A constant describing a layer consisting of target group nodes and dummy nodes.
Describes a layer above a group to store the connector proxies where edges connect to groups.
Converts the argument to LayerType.
value