question: returns the cache directive id from the given table/partition parameter map . returns null if the cache_dir_id_prop_name key was not set or if there was an error parsing the associated id . concode_field_sep DistributedFileSystem dfs concode_elem_sep Logger LOG concode_elem_sep String CACHE_DIR_ID_PROP_NAME concode_elem_sep int MAX_UNCHANGED_CACHING_REFRESH_INTERVALS concode_field_sep void waitForDirective concode_elem_sep void uncacheTbl concode_elem_sep String getCachePool concode_elem_sep long submitCacheTblDirective concode_elem_sep long submitCachePartitionDirective concode_elem_sep long submitDirective concode_elem_sep void removeDirective concode_elem_sep void uncachePartition
target: Long function ( Map < String , String > arg0 ) { return null ; }