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Sankey Node Value

I am attempting to have nodes in the sankey diagram represent the values for both incoming and outgoing flows. Is there any way to manipulate this behavior?

Sankey Diagram Example:

The node value only shows the sum of the outgoing flow count. Please advise if there is a way to include sum of incoming and outgoing flow count.

For example, in the example link above, Facebook Inc shows value 12.1M when total (incoming + outgoing) value is 14.68M.