* <p>Changes to the returned collection will update the underlying multimap, and vice versa.
   */
  Collection<V> get(@ParametricNullness K key);

  /**
   * Returns a view collection of all <i>distinct</i> keys contained in this multimap. Note that the
   * key set contains a key if and only if this multimap maps that key to at least one value.
   *
   * <p>Changes to the returned set will update the underlying multimap, and vice versa. However,

        entity.asDocMeta().indexOption(opLambda);
        doInsert(entity, null);
    }

    public void update(WebAuthentication entity) {
        doUpdate(entity, null);
    }

    public void update(WebAuthentication entity, RequestOptionCall<IndexRequestBuilder> opLambda) {
        entity.asDocMeta().indexOption(opLambda);
        doUpdate(entity, null);
    }

                    final MD4 md4 = new MD4();
                    md4.update(responseKeyNT);
                    final byte[] userSessionKey = md4.digest();

                    final HMACT64 hmac = new HMACT64(userSessionKey);
                    hmac.update(sessionNonce);
                    final byte[] ntlm2SessionKey = hmac.digest();

    }

    public void setUpdatedBy_Equal(String updatedBy) {
        setUpdatedBy_Term(updatedBy, null);
    }

    public void setUpdatedBy_Equal(String updatedBy, ConditionOptionCall<TermQueryBuilder> opLambda) {
        setUpdatedBy_Term(updatedBy, opLambda);
    }

    public void setUpdatedBy_Term(String updatedBy) {
        setUpdatedBy_Term(updatedBy, null);
    }

        entity.asDocMeta().indexOption(opLambda);
        doInsert(entity, null);
    }

    public void update(AccessToken entity) {
        doUpdate(entity, null);
    }

    public void update(AccessToken entity, RequestOptionCall<IndexRequestBuilder> opLambda) {
        entity.asDocMeta().indexOption(opLambda);
        doUpdate(entity, null);
    }

        entity.asDocMeta().indexOption(opLambda);
        doInsert(entity, null);
    }

    public void update(ElevateWordToLabel entity) {
        doUpdate(entity, null);
    }

    public void update(ElevateWordToLabel entity, RequestOptionCall<IndexRequestBuilder> opLambda) {
        entity.asDocMeta().indexOption(opLambda);
        doUpdate(entity, null);
    }

        entity.asDocMeta().indexOption(opLambda);
        doInsert(entity, null);
    }

    public void update(KeyMatch entity) {
        doUpdate(entity, null);
    }

    public void update(KeyMatch entity, RequestOptionCall<IndexRequestBuilder> opLambda) {
        entity.asDocMeta().indexOption(opLambda);
        doUpdate(entity, null);
    }

        entity.asDocMeta().indexOption(opLambda);
        doInsert(entity, null);
    }

    public void update(RelatedContent entity) {
        doUpdate(entity, null);
    }

    public void update(RelatedContent entity, RequestOptionCall<IndexRequestBuilder> opLambda) {
        entity.asDocMeta().indexOption(opLambda);
        doUpdate(entity, null);
    }

        entity.asDocMeta().indexOption(opLambda);
        doInsert(entity, null);
    }

    public void update(RelatedQuery entity) {
        doUpdate(entity, null);
    }

    public void update(RelatedQuery entity, RequestOptionCall<IndexRequestBuilder> opLambda) {
        entity.asDocMeta().indexOption(opLambda);
        doUpdate(entity, null);
    }

        entity.asDocMeta().indexOption(opLambda);
        doInsert(entity, null);
    }

    public void update(FavoriteLog entity) {
        doUpdate(entity, null);
    }

    public void update(FavoriteLog entity, RequestOptionCall<IndexRequestBuilder> opLambda) {
        entity.asDocMeta().indexOption(opLambda);
        doUpdate(entity, null);
    }