




 
Returns the index of 
item
 in the 
collection
, using the 
collection-test-function
 to determine equality, and returns nil if no match is found.
The search is done by sequentially comparing 
item
 to each item in 
collection
 using the collection's 
test-function
, which is cl:eq by default.
search-for-item is the counterpart function to get-collection-item which given an index, finds the appropriate item. 
CAPI User Guide and Reference Manual (Unix version) - 25 Feb 2015