Type Alias AttrMerger

AttrMerger: (nodeAttrs: GraphNode, intoAttrs: GraphNode) => GraphNode | null

Merges the attributes of two nodes, or aborts the merge.

The function MUST NOT modify the input arguments.

Type declaration

- (nodeAttrs: GraphNode, intoAttrs: GraphNode): GraphNode | null
- Parameters
  - nodeAttrs: GraphNode
    the node to disappear
  - intoAttrs: GraphNode
    the node accepting the new attributes
  Returns GraphNode | null
  the new node attribute if the merge is successful, or null to abort it.