n = new GroupCombineNode((GroupCombineOperatorBase<?, ?, ?>) c);
when(op.getParameters()).thenReturn(new Configuration()); GroupCombineNode node = new GroupCombineNode(op);
n = new GroupCombineNode((GroupCombineOperatorBase<?, ?, ?>) c);
n = new GroupCombineNode((GroupCombineOperatorBase<?, ?, ?>) c);
n = new GroupCombineNode((GroupCombineOperatorBase<?, ?, ?>) c);
n = new GroupCombineNode((GroupCombineOperatorBase<?, ?, ?>) c);