// via delegate()); it seems inappropriate to throw ISE on this method.
  @Override
  public int hashCode() {
    return delegate.hashCode();
  }

  private void validate() {
    // Don't use checkState(), because we don't want the overhead of generating the error message
    // unless it's actually going to be used; validate() is called for all set method calls, so it
    // needs to be fast.

 */

package com.google.common.graph;

import static com.google.common.base.Preconditions.checkArgument;
import static com.google.common.base.Preconditions.checkNotNull;
import static com.google.common.base.Preconditions.checkState;
import static com.google.common.graph.GraphConstants.ENDPOINTS_MISMATCH;
import static com.google.common.graph.GraphConstants.NODE_PAIR_REMOVED_FROM_GRAPH;

 */

package com.google.common.graph;

import static com.google.common.base.Preconditions.checkArgument;
import static com.google.common.base.Preconditions.checkNotNull;
import static com.google.common.base.Preconditions.checkState;
import static com.google.common.graph.GraphConstants.ENDPOINTS_MISMATCH;
import static com.google.common.graph.GraphConstants.NODE_PAIR_REMOVED_FROM_GRAPH;

     */
    @Nullable
    Task getCheckTask();

    /**
     * Specifies the task responsible for checking this component.
     */
    void setCheckTask(@Nullable Task checkTask);

    /**
     * Adds tasks required to check this component. Tasks added this way are subsequently
     * added as dependencies of this component's {@link #getCheckTask() check task}.
     */

 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package com.google.common.testing;

import static com.google.common.base.Preconditions.checkState;
import static com.google.common.truth.Truth.assertThat;

import com.google.common.annotations.GwtCompatible;
import com.google.common.base.Equivalence;
import com.google.common.base.MoreObjects;

 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package com.google.common.testing;

import static com.google.common.base.Preconditions.checkState;
import static com.google.common.truth.Truth.assertThat;

import com.google.common.annotations.GwtCompatible;
import com.google.common.base.Equivalence;
import com.google.common.base.MoreObjects;

    }

    /**
     * Restores the input tracking state to the state it was in before the last call to
     * [disableForCurrentThread].
     */
    fun restoreForCurrentThread() {
        Preconditions.checkState(inputTrackingDisabledCounterForThread > 0, "Restore input tracking state without prior disable is detected")
        --inputTrackingDisabledCounterForThread
    }
}


private

        this.walker = new CachingDirectedGraphWalker<>(new TaskGraphImpl(workResolvers));
    }

    public Set<T> getDependencies(@Nullable Task task, Object dependencies) {
        Preconditions.checkState(this.task == null);
        this.task = task;
        try {
            walker.add(dependencies);
            return walker.findValues();
        } catch (Exception e) {
            if (task != null) {

      try {
        while (true) {
          ListenerCallQueue.Event<L> nextToRun;
          Object nextLabel;
          synchronized (PerListenerQueue.this) {
            Preconditions.checkState(isThreadScheduled);
            nextToRun = waitQueue.poll();
            nextLabel = labelQueue.poll();
            if (nextToRun == null) {
              isThreadScheduled = false;
              stillRunning = false;

      try {
        while (true) {
          ListenerCallQueue.Event<L> nextToRun;
          Object nextLabel;
          synchronized (PerListenerQueue.this) {
            Preconditions.checkState(isThreadScheduled);
            nextToRun = waitQueue.poll();
            nextLabel = labelQueue.poll();
            if (nextToRun == null) {
              isThreadScheduled = false;
              stillRunning = false;