original_string: protected function parseTransactionDebitCredit()
      {
          $results = [];
          if (preg_match('/^:61:\d+([CD])\d+/', $this->getCurrentTransactionData(), $results)
              && !empty($results[1])
          ) {
              return $this->sanitizeDebitCredit($results[1]);
          }
  
          return '';
      }
code: protected function parseTransactionDebitCredit()
      {
          $results = [];
          if (preg_match('/^:61:\d+([CD])\d+/', $this->getCurrentTransactionData(), $results)
              && !empty($results[1])
          ) {
              return $this->sanitizeDebitCredit($results[1]);
          }
  
          return '';
      }
code_tokens: protected function parseTransactionDebitCredit ( ) { $ results = [ ] ; if ( preg_match ( '/^:61:\d+([CD])\d+/' , $ this -> getCurrentTransactionData ( ) , $ results ) && ! empty ( $ results [ 1 ] ) ) { return $ this -> sanitizeDebitCredit ( $ results [ 1 ] ) ; } return '' ; }
docstring: uses the 61 field to determine debit or credit of the transaction.
  
  @return string
docstring_tokens: uses the 61 field to determine debit or credit of the transaction .