Vertex2d get(int rowIndex, int columnIndex) {

			Row<FGVertex> row = layoutToGridMap.row(rowIndex);
			FGVertex v = row.getVertex(columnIndex);
			if (v == null) {
				return null;
			}
			return get(v);
		}
Factory for creating and caching {@link Vertex2d} objects
Ghidra/Features/FunctionGraphDecompilerExtension/src/main/java/ghidra/app/plugin/core/functiongraph/graph/layout/DecompilerNestedLayout.java