format to 'n/a' if no value is passed to the formatter
format to 'n/a' if no value is passed to the formatter

kexplo/react-data-grid,nathanial/react-data-grid,sachgits/react-data-grid,somethingnew2-0/react-data-grid,jeffvan576/react-data-grid,yogesh-patel/react-data-grid,fayizk1/react-data-grid,bor3ham/react-data-grid