used to check if a string is null or empty concode_field_sep char[] hexArray concode_field_sep String padRight concode_elem_sep String bytesToHex concode_elem_sep boolean isNullOrWhitespace concode_elem_sep boolean areEqual concode_elem_sep String byteArrayToHexString concode_elem_sep boolean isWhitespace concode_elem_sep boolean isNullEmptyOrWhiteSpace concode_elem_sep String padLeft
boolean function ( String arg0 ) { return arg0 == null || arg0 . length ( ) == 0 ; }