/**
* Determines the order in which two strings should appear in a place where it matters, assuming the ascending
* order and comparing the strings case-insensitively.
*
* @param string $toString The second string for comparison.
* @param bitfield $collationFlags **OPTIONAL. Default is** `COLLATION_DEFAULT`. The collation option(s) to be
* used for the comparison. The available collation options are `COLLATION_IGNORE_ACCENTS`,
* `COLLATION_IGNORE_NONWORD`, `COLLATION_UPPERCASE_FIRST`, and `COLLATION_FRENCH` (see [Summary](#summary)).
* @param CULocale $inLocale **OPTIONAL. Default is** *the application's default locale*. The locale in which the
* strings are to be compared.
*
* @return int `-1` if *this* string should go before the second string, `1` if the other way around, and `0` if
* the two strings are equal, ignoring the letter case of the characters.
*/
public function compareCi($toString, $collationFlags = self::COLLATION_DEFAULT, CULocale $inLocale = null)
{
return CUString::compareCi($this, $toString, $collationFlags, $inLocale);
}