docs: public boolean isIndexImmutable(Object request) {
          
          if(!this.enabled) {
              return false;
          }
          
          if(immutableIndicesPatterns.isEmpty()) {
              return false;
          }
          
          final Resolved resolved = irr.resolveRequest(request);
          final Set<String> allIndices = resolved.getAllIndices();
          
          //assert allIndices.size() == 1:"only one index here, not "+allIndices;
          //assert allIndices.contains("_all"):"no _all in "+allIndices;
          //assert allIndices.contains("*"):"no * in "+allIndices;
          //assert allIndices.contains(""):"no EMPTY in "+allIndices;
  
          return WildcardMatcher.matchAny(immutableIndicesPatterns, allIndices);
      }