question: gets the operator-level caching description for this input . concode_field_sep IntermediateDataSetID sourceId concode_elem_sep String preProcessingOperationName concode_elem_sep String shipStrategyName concode_elem_sep String operatorLevelCachingDescription concode_elem_sep long serialVersionUID concode_elem_sep IntermediateDataSet source concode_elem_sep DistributionPattern distributionPattern concode_elem_sep JobVertex target concode_field_sep void setOperatorLevelCachingDescription concode_elem_sep JobVertex getTarget concode_elem_sep String getPreProcessingOperationName concode_elem_sep IntermediateDataSet getSource concode_elem_sep DistributionPattern getDistributionPattern concode_elem_sep String getShipStrategyName concode_elem_sep void setShipStrategyName concode_elem_sep boolean isIdReference concode_elem_sep void connecDataSet concode_elem_sep String toString concode_elem_sep void setPreProcessingOperationName concode_elem_sep IntermediateDataSetID getSourceId
target: String function ( ) { return operatorLevelCachingDescription ; }