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public interface GraphKeys
This is a marker interface, it defines no methods. It is intended to mark classes used to hold static constants but it is by no means limited to this. A
GraphKeys
instance can be used for any class that provides something useful or necessary to a graphing implementation.
One possible use of GraphKeys is as a Rendering Context Object. If an implementation has some context requirements but they are not complicated, the necessary machinery can be built into a class which in turn implements this interface. Alternately, if rendering context requirements are more complex, the GraphKeys class can be used to create or provide them.
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