If not null, a plain object with properties:
type [type: String] - type of cell
rowOrdinals [type: Array] - the row tuple ordinals
columnOrdinals [type: Array] - the column tuple ordinals
nodes [type: Array] - selected nodes
relationshipMetricSetBindingId [type: String] - relationshipMetricSetBindingId
infoMetricSetBindingId [type: String] - infoMetricSetBindingId