question: check whether the string is null or empty concode_field_sep String PROPERTY_DEFAULT_SEPARATOR concode_field_sep boolean isNotNull concode_elem_sep String getSystemPropertyAsString concode_elem_sep void match concode_elem_sep String decode concode_elem_sep List<String> tokenize
target: boolean function ( String arg0 ) { return arg0 == null || arg0 . isEmpty ( ) ; }