Hunt for the item in the container. Key and Test
are as in member.
search-for-item < > < t > |
search-for-item < > < t > |
search-for-item < > < t > |
search-for-item < > < t > |
search-for-item < > < t > |
search-for-item < > < t > |
search-for-item < list > < t > |
search-for-item < > < t > |