original_string: public function rollback()
  	{
  		if($this->hasBackup)
  		{
  			$this->params = $this->backup;
  
  		} else
  		{
  			throw new Exceptions\NoValidBackup($this->params);
  		}	
  	}
code: public function rollback()
  	{
  		if($this->hasBackup)
  		{
  			$this->params = $this->backup;
  
  		} else
  		{
  			throw new Exceptions\NoValidBackup($this->params);
  		}	
  	}
code_tokens: public function rollback ( ) { if ( $ this -> hasBackup ) { $ this -> params = $ this -> backup ; } else { throw new Exceptions \ NoValidBackup ( $ this -> params ) ; } }
docstring: Uses the backup array to revert the params array
  
  @return void
  @author Dan Cox
  
  @throws Exceptions\NoValidBackup
docstring_tokens: Uses the backup array to revert the params array