### Question:
EditablePopupHeaderMetaData implements EditableHeaderMetaData { @Override public void destroyResources() { editor.hide(); } EditablePopupHeaderMetaData(final CellEditorControlsView.Presenter cellEditorControls,
                                       final E editor); @Override void setColumnGroup(final String columnGroup); @Override void setTitle(final String title); @Override void edit(final GridBodyCellEditContext context); @Override void destroyResources();  }### Answer:
@Test public void testDestroyResources() { header.destroyResources(); verify(editor).hide(); }