@Override
		public int hashCode() {
			int val = node.hashCode();
			val = val * 31 + slot;
			return val;
		}
Helper class for associating a DataVertex with another DataVertex.
To distinguish multiple things associated with one DataVertex, an optional
slot indicates through which input slot the association is made.
Ghidra/Features/CodeCompare/src/main/java/ghidra/features/codecompare/graphanalysis/DataGraph.java