public static VariableColumnTableModel from(TableModel m) {
		TableModel unwrapped = RowObjectTableModel.unwrap(m);
		if (unwrapped instanceof VariableColumnTableModel) {
			return (VariableColumnTableModel) unwrapped;
		}
		return null;
	}
Returns a {@link VariableColumnTableModel} if the given model is an instance of this
type or is wraps another table model that is an instance of this type.  If the given 
model is not such an instance, then null is returned.

@return the variable column model
Ghidra/Framework/Docking/src/main/java/docking/widgets/table/VariableColumnTableModel.java