original_string: public static function that($condition, $message = null)
      {
          if ($condition === true) {
              return;
          }
          if (isset($message)) {
              throw new InvalidArgumentException($message);
          }
          $bt = debug_backtrace();
          $call = $bt[0];
          $lines = file($call['file']);
          preg_match('/' . $call['function'] . '\((.+)\)/', $lines[$call['line'] - 1], $matches);
          throw new InvalidArgumentException('Assumption failed: ' . $matches[1]);
      }
code: public static function that($condition, $message = null)
      {
          if ($condition === true) {
              return;
          }
          if (isset($message)) {
              throw new InvalidArgumentException($message);
          }
          $bt = debug_backtrace();
          $call = $bt[0];
          $lines = file($call['file']);
          preg_match('/' . $call['function'] . '\((.+)\)/', $lines[$call['line'] - 1], $matches);
          throw new InvalidArgumentException('Assumption failed: ' . $matches[1]);
      }
code_tokens: public static function that ( $ condition , $ message = null ) { if ( $ condition === true ) { return ; } if ( isset ( $ message ) ) { throw new InvalidArgumentException ( $ message ) ; } $ bt = debug_backtrace ( ) ; $ call = $ bt [ 0 ] ; $ lines = file ( $ call [ 'file' ] ) ; preg_match ( '/' . $ call [ 'function' ] . '\((.+)\)/' , $ lines [ $ call [ 'line' ] - 1 ] , $ matches ) ; throw new InvalidArgumentException ( 'Assumption failed: ' . $ matches [ 1 ] ) ; }
docstring: Precondition function that can be used to add additional constraints to
  function parameters.
  
  @param bool $condition
  Condition.
  @param string $message
  Failure message.
  @throws InvalidArgumentException If condition is false.
docstring_tokens: Precondition function that can be used to add additional constraints to function parameters .