Creates a DefaultNodePreVisitor that per node type only visits the known keys it is told to visit, skipping the others, and unknown keys like those of an extension.
per node type, its keys holding objects, and whether to visit them.
the contexts per node type, to give to a TransformerTyped or TransformerSubTyped.
Creates a DefaultNodePreVisitor that per node type only visits the known keys it is told to visit, skipping the others, and unknown keys like those of an extension.