The interface for getting the parent ids from data. This must return an array of the ids of every parent of this node. i will increment in the order nodes are processed.
i
This can be modified with the Stratify#parentIds method.
get parent ids from a node datum
the node data to get parent ids from
the order that the datum was encountered in
parentIds - the parent ids that correspond to the node datum, undefined is the same as empty
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The interface for getting the parent ids from data. This must return an array of the ids of every parent of this node.
iwill increment in the order nodes are processed.This can be modified with the Stratify#parentIds method.