question: get the retentiontime value . concode_field_sep Integer maxTaskRetryCount concode_elem_sep Period maxWallClockTime concode_elem_sep Period retentionTime concode_field_sep TaskConstraints withRetentionTime concode_elem_sep TaskConstraints withMaxWallClockTime concode_elem_sep Integer maxTaskRetryCount concode_elem_sep TaskConstraints withMaxTaskRetryCount concode_elem_sep Period maxWallClockTime
target: Period function ( ) { return this . retentionTime ; }