The base interface for search engines that implement an object select operation.
In an object select operation, the search engine opens a window from which users can select from a list of items returned by a search query. The search engine is responsible for the windowing and the searching. SearchService.ObjectSelector uses this type of search.
| SelectObject | This function is called when a window must be opened to perform a search and select operation. |
| SetSearchFilter | This function is called when the initial search text for the object selector window is set. |