EENum AnchorType
Defines the directional type of anchors. This impacts how edges can used these anchors (see EdgeType).
The EENum provides the following literals:
BOTH = 0
Anchors that can act as source or a target. Combine with EdgeType ONE2ONE to reliably avoid self-references. Can work with other EdgeType if never two same anchors.
TARGET = 1
Anchors that can act as a target.
SOURCE = 2
Anchors that can act as a source.