/**
* Determines if a string contains a specified substring, searching case-sensitively.
*
* @param string $whatString The searched substring.
* @param int $startPos **OPTIONAL. Default is** `0`. The starting position for the search.
*
* @return bool `true` if the substring was found in the string, taking into account the letter case during the
* search, and `false` otherwise.
*/
public function find($whatString, $startPos = 0)
{
return CUString::find($this, $whatString, $startPos);
}