/**
  * 
  * @param string $prefix
  * @return InvalidTimePrefixException
  */
 public static function get($prefix)
 {
     return parent::get(sprintf('Invalid time prefix %s!', $prefix));
 }
 /**
  * 
  * @param string $character
  * @return UnexcepectedCharacterException
  */
 public static function get($character)
 {
     $message = sprintf('Unexpected character "%s"', $character);
     return parent::get($message);
 }