import org.opensearch.index.query.RangeQueryBuilder;
import org.opensearch.index.query.RegexpQueryBuilder;
import org.opensearch.index.query.SpanTermQueryBuilder;
import org.opensearch.index.query.TermQueryBuilder;
import org.opensearch.index.query.TermsQueryBuilder;
import org.opensearch.index.query.WildcardQueryBuilder;
import org.opensearch.index.query.functionscore.FunctionScoreQueryBuilder;

    @Override
    public void add(int index, E element) {
      synchronized (mutex) {
        delegate().add(index, element);
      }
    }

    @Override
    public boolean addAll(int index, Collection<? extends E> c) {
      synchronized (mutex) {
        return delegate().addAll(index, c);
      }
    }

    @Override
    public E get(int index) {
      synchronized (mutex) {

    final ImmutableMap<E, Integer> index = Maps.indexMap(set);
    checkNonnegative(size, "size");
    checkArgument(size <= index.size(), "size (%s) must be <= set.size() (%s)", size, index.size());
    if (size == 0) {
      return ImmutableSet.<Set<E>>of(ImmutableSet.<E>of());
    } else if (size == index.size()) {
      return ImmutableSet.<Set<E>>of(index.keySet());
    }
    return new AbstractSet<Set<E>>() {

import org.opensearch.index.query.RangeQueryBuilder;
import org.opensearch.index.query.RegexpQueryBuilder;
import org.opensearch.index.query.SpanTermQueryBuilder;
import org.opensearch.index.query.TermQueryBuilder;
import org.opensearch.index.query.TermsQueryBuilder;
import org.opensearch.index.query.WildcardQueryBuilder;
import org.opensearch.index.query.functionscore.FunctionScoreQueryBuilder;

    String INDEX_ADMIN_ARRAY_FIELD_SET = "indexAdminArrayFieldSet";

    String INDEX_ADMIN_DATE_FIELD_SET = "indexAdminDateFieldSet";

    String INDEX_ADMIN_INTEGER_FIELD_SET = "indexAdminIntegerFieldSet";

    String INDEX_ADMIN_LONG_FIELD_SET = "indexAdminLongFieldSet";

    String INDEX_ADMIN_FLOAT_FIELD_SET = "indexAdminFloatFieldSet";

import org.opensearch.index.query.RangeQueryBuilder;
import org.opensearch.index.query.RegexpQueryBuilder;
import org.opensearch.index.query.SpanTermQueryBuilder;
import org.opensearch.index.query.TermQueryBuilder;
import org.opensearch.index.query.TermsQueryBuilder;
import org.opensearch.index.query.WildcardQueryBuilder;
import org.opensearch.index.query.functionscore.FunctionScoreQueryBuilder;

         * of the array becomes null only when we iterate past it and then clear it.
         */
        I result = requireNonNull(elements[index]);
        elements[index] = null;
        index++;
        return result;
      }
    };
  }

  /**
   * Combines two iterators into a single iterator. The returned iterator iterates across the

        }
      }
    }

    @Override
    public boolean matches(char c) {
      int index = Arrays.binarySearch(rangeStarts, c);
      if (index >= 0) {
        return true;
      } else {
        index = ~index - 1;
        return index >= 0 && c <= rangeEnds[index];
      }
    }

    @Override
    public String toString() {
      return description;
    }

import org.opensearch.index.query.RangeQueryBuilder;
import org.opensearch.index.query.RegexpQueryBuilder;
import org.opensearch.index.query.SpanTermQueryBuilder;
import org.opensearch.index.query.TermQueryBuilder;
import org.opensearch.index.query.TermsQueryBuilder;
import org.opensearch.index.query.WildcardQueryBuilder;
import org.opensearch.index.query.functionscore.FunctionScoreQueryBuilder;

        }
      }
    }

    @Override
    public boolean matches(char c) {
      int index = Arrays.binarySearch(rangeStarts, c);
      if (index >= 0) {
        return true;
      } else {
        index = ~index - 1;
        return index >= 0 && c <= rangeEnds[index];
      }
    }

    @Override
    public String toString() {
      return description;
    }