question: creates a function that returns a on instance with zero value concode_field_sep Map<CronFieldName,Function<CronField,CronField>> mappings concode_elem_sep Function<Cron,Cron> cronRules concode_elem_sep CronDefinition to concode_field_sep Function<Cron,Cron> setQuestionMark concode_elem_sep Function<CronField,CronField> returnAlwaysExpression concode_elem_sep CronMapper fromUnixToQuartz concode_elem_sep Function<CronField,CronField> returnSameExpression concode_elem_sep Function<CronField,CronField> dayOfMonthMapping concode_elem_sep CronMapper fromQuartzToUnix concode_elem_sep CronMapper fromQuartzToCron4j concode_elem_sep CronMapper sameCron concode_elem_sep Function<Cron,Cron> sameCron concode_elem_sep Function<CronField,CronField> dayOfWeekMapping concode_elem_sep CronMapper fromCron4jToQuartz concode_elem_sep Cron map concode_elem_sep void buildMappings
target: Function < CronField , CronField > function ( final CronFieldName arg0 ) { return field -> { FieldConstraints loc0 = FieldConstraintsBuilder . instance ( ) . forField ( arg0 ) . createConstraintsInstance ( ) ; return new CronField ( arg0 , new On ( new IntegerFieldValue ( 0 ) ) , loc0 ) ; } ; }