question: performs work within a transaction . concode_field_sep String[] INT_NAMES concode_elem_sep ClassCatalog catalog concode_elem_sep boolean create concode_elem_sep Environment env concode_elem_sep SortedMap map concode_elem_sep Database db concode_field_sep void main concode_elem_sep void writeAndRead concode_elem_sep void close concode_elem_sep void open
target: void function ( ) { writeAndRead ( ) ; }