difference() public static method

Returns the diff between two arrays or strings.
public static difference ( array | string $from, array | string $to, integer $contextLines = 3 ) : string
$from array | string
$to array | string
$contextLines integer
return string
 /**
  * Calculate the unified diff between the original source code and its
  * its mutated form
  *
  * @return string
  */
 public function getDiff()
 {
     $original = $this->_reconstructFromTokens($this->_tokensOriginal);
     $mutated = $this->_reconstructFromTokens($this->_tokensMutated);
     $difference = \Mutagenesis\Utility\Diff::difference($original, $mutated);
     return $difference;
 }