public static function iconSignature(string $extensionKey, string $iconIdentifier, string $separator = '-'): string {
    $iconSignature = mb_strtolower("${extensionKey}${separator}${iconIdentifier}");

    return $iconSignature;
  }
public static function iconSignature(string $extensionKey, string $iconIdentifier, string $separator = '-'): string {
    $iconSignature = mb_strtolower("${extensionKey}${separator}${iconIdentifier}");

    return $iconSignature;
  }
public static function iconSignature ( string $ extensionKey , string $ iconIdentifier , string $ separator = '-' ) : string { $ iconSignature = mb_strtolower ( "${extensionKey}${separator}${iconIdentifier}" ) ; return $ iconSignature ; }
Gets an icon signature from an extension key and icon identifier.

@param string $extensionKey The extension key
@param string $iconIdentifier The icon identifier
@param string $separator The optional separator, defaults to `-`
@return string The icon signature
Gets an icon signature from an extension key and icon identifier .