question: public String businessObjectDataKeyToString ( BusinessObjectDataKey businessObjectDataKey ) { if ( businessObjectDataKey == null ) { return null ; } return businessObjectDataKeyToString ( businessObjectDataKey . getNamespace ( ) , businessObjectDataKey . getBusinessObjectDefinitionName ( ) , businessObjectDataKey . getBusinessObjectFormatUsage ( ) , businessObjectDataKey . getBusinessObjectFormatFileType ( ) , businessObjectDataKey . getBusinessObjectFormatVersion ( ) , businessObjectDataKey . getPartitionValue ( ) , businessObjectDataKey . getSubPartitionValues ( ) , businessObjectDataKey . getBusinessObjectDataVersion ( ) ) ; }
target:  Returns a string representation of the business object data key.