@@ -19,8 +19,10 @@ package org.openqa.selenium.grid.graphql;
 
 import com.google.common.base.Suppliers;
 import com.google.common.collect.ImmutableList;
+
 import org.openqa.selenium.grid.data.DistributorStatus;
 import org.openqa.selenium.grid.distributor.Distributor;
+import org.openqa.selenium.grid.sessionmap.SessionMap;
 import org.openqa.selenium.internal.Require;
 
 import java.net.URI;
// Licensed to the Software Freedom Conservancy (SFC) under one
// or more contributor license agreements.  See the NOTICE file
// distributed with this work for additional information
// regarding copyright ownership.  The SFC licenses this file
// to you under the Apache License, Version 2.0 (the
// "License"); you may not use this file except in compliance
// with the License.  You may obtain a copy of the License at
//
//   http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing,
// software distributed under the License is distributed on an
// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
// KIND, either express or implied.  See the License for the
// specific language governing permissions and limitations
// under the License.

package org.openqa.selenium.grid.graphql;

import com.google.common.base.Suppliers;
import com.google.common.collect.ImmutableList;
import org.openqa.selenium.grid.data.DistributorStatus;
import org.openqa.selenium.grid.distributor.Distributor;
import org.openqa.selenium.internal.Require;

import java.net.URI;
import java.util.List;
import java.util.function.Supplier;

public class Grid {

  private final URI uri;
  private final Supplier<DistributorStatus> distributorStatus;

  public Grid(Distributor distributor, URI uri) {
    Require.nonNull("Distributor", distributor);
    this.uri = Require.nonNull("Grid's public URI", uri);

    this.distributorStatus = Suppliers.memoize(distributor::getStatus);
  }

  public URI getUri() {
    return uri;
  }

  public List<Node> getNodes() {
    return distributorStatus.get().getNodes().stream()
      .map(summary -> new Node(summary.getNodeId(),
                               summary.getUri(),
                               summary.isUp(),
                               summary.getMaxSessionCount(),
                               summary.getStereotypes()))
      .collect(ImmutableList.toImmutableList());
  }

  public int getTotalSlots() {
    return distributorStatus.get().getNodes().stream()
      .map(summary -> {
        int slotCount = summary.getStereotypes().values().stream().mapToInt(i -> i).sum();
        return Math.min(summary.getMaxSessionCount(), slotCount);
      })
      .mapToInt(i -> i)
      .sum();
  }

  public int getUsedSlots() {
    return distributorStatus.get().getNodes().stream()
      .map(summary -> summary.getUsedStereotypes().values().stream().mapToInt(i -> i).sum())
      .mapToInt(i -> i)
      .sum();
  }
}

I think that this is an unused import