when(mockClearScrollBuilder.addScrollId(any(String.class))).thenReturn(mockClearScrollBuilder);
        doAnswer(invocation -> {
            ActionListener<ClearScrollResponse> listener = invocation.getArgument(0);
            listener.onResponse(mock(ClearScrollResponse.class));
            return null;
        }).when(mockClearScrollBuilder).execute(any(ActionListener.class));