anchor.diff:  Fixed bit sets are used for nested object field types and
   type filters for <<parent-join,join>> fields.
   
  -`indices.segments.fixed_bit_set_memory_in_bytes`::
  +`fixed_bit_set_memory_in_bytes`::
   (integer)
   Total amount of memory, in bytes, used by fixed bit sets across all shards
   assigned to the node.
  
positive.code: 
  
  `<metric>`::
      (Optional, string) Limits the information returned to the specific metrics. 
      A comma-separated list of the following options: 
  +
  --
    `adaptive_selection`::
        Statistics about <<search-adaptive-replica,adaptive replica selection>>.
        
    `breaker`::
        Statistics about the field data circuit breaker.
        
    `discovery`::
        Statistics about the discovery.
            
    `fs`::
        File system information, data path, free disk space, read/write
        stats.
            
    `http`::
        HTTP connection information.
    
    `indices`::
        Indices stats about size, document count, indexing and deletion times, 
        search times, field cache size, merges and flushes.
        
    `ingest`::
        Statistics about ingest preprocessing.
    
    `jvm`::
        JVM stats, memory pool information, garbage collection, buffer
        pools, number of loaded/unloaded classes.
  
negative.code: GET /_nodes/10.0.0.1/stats/process
  --------------------------------------------------
  
  All stats can be explicitly requested via `/_nodes/stats/_all` or
  `/_nodes/stats?metric=_all`.
  
  You can get information about indices stats on `node`, `indices`, or `shards`
  level.
  
  [source,console]
  