static {
   IndexMetaData.addDynamicSettings(
       "index.merge.policy.min_merge_size",
       "index.merge.policy.max_merge_size",
       "index.merge.policy.max_merge_docs",
       "index.merge.policy.merge_factor",
       "index.compound_format");
 }
 static {
   IndexMetaData.addDynamicSettings(
       "index.merge.policy.expunge_deletes_allowed",
       "index.merge.policy.floor_segment",
       "index.merge.policy.max_merge_at_once",
       "index.merge.policy.max_merge_at_once_explicit",
       "index.merge.policy.max_merged_segment",
       "index.merge.policy.segments_per_tier",
       "index.merge.policy.reclaim_deletes_weight",
       "index.compound_format");
 }