[#4FB8DA9B975944CB12FD91C010774FD3916A96E8]
Find a matching key
iterator find_last( core::string_view key, ignore_case_param ic = = {}) const noexcept;
This function examines the parameters in the container to find a match for the specified key. The comparison is performed as if all escaped characters were decoded first.
The search starts from the last param and proceeds backwards until either the key is found or the beginning of the range is reached, in which case `end()` is returned.
assert( (*url_view( "?first=John&last=Doe" ).params().find_last( "last" )).value == "Doe" );
Linear in `this->buffer().size()`.