/**
* Determines if a string is equal to another string, comparing case-insensitively.
*
* @param string $toString The second string for comparison.
* @param bitfield $collationFlags **OPTIONAL. Default is** `COLLATION_DEFAULT`. The collation option(s) to be
* used for the comparison. The available collation options are `COLLATION_IGNORE_ACCENTS`,
* `COLLATION_IGNORE_NONWORD`, `COLLATION_UPPERCASE_FIRST`, and `COLLATION_FRENCH` (see [Summary](#summary)).
*
* @return bool `true` if the two strings are equal, ignoring the letter case of the characters, and `false`
* otherwise.
*/
public function equalsCi($toString, $collationFlags = self::COLLATION_DEFAULT)
{
return CUString::equalsCi($this, $toString, $collationFlags);
}