@CollectionSize.Require(absent = ZERO)
  public void testCreateWithNull_unsupported() {
    E[] array = createArrayWithNullElement();

    try {
      // TODO(kak): remove unused capture
      Object unused = getSubjectGenerator().create(array);
      fail("Creating a collection containing null should fail");
    } catch (NullPointerException expected) {
    }
  }

  /**

        if (new TypeCapture<Entry<String, int[][]>>() {}.capture()
            .toString()
            .contains("java.util.Map.java.util.Map")) {
          CURRENT = JAVA8;
        } else {
          CURRENT = JAVA9;
        }
      } else if (new TypeCapture<int[]>() {}.capture() instanceof Class) {
        CURRENT = JAVA7;
      } else {
        CURRENT = JAVA6;
      }

 */
public abstract class TypeParameter<T> extends TypeCapture<T> {

  final TypeVariable<?> typeVariable;

  protected TypeParameter() {
    Type type = capture();
    checkArgument(type instanceof TypeVariable, "%s should be a type variable.", type);
    this.typeVariable = (TypeVariable<?>) type;
  }

  @Override
  public final int hashCode() {

  @CollectionSize.Require(absent = ZERO)
  public void testCreateWithNull_unsupported() {
    E[] array = createArrayWithNullElement();

    try {
      // TODO(kak): remove unused capture
      Object unused = getSubjectGenerator().create(array);
      fail("Creating a collection containing null should fail");
    } catch (NullPointerException expected) {
    }
  }

  /**

          return new Type[] {new TypeCapture<P>() {}.capture()};
        }

        @Override
        public Type getOwnerType() {
          return new TypeCapture<O>() {}.capture();
        }

        @Override
        public Type getRawType() {
          return new TypeCapture<T>() {}.capture();
        }
      };
    }
  }

import java.lang.reflect.ParameterizedType;
import java.lang.reflect.Type;

/**
 * Captures the actual type of {@code T}.
 *
 * @author Ben Yu
 */
@ElementTypesAreNonnullByDefault
abstract class TypeCapture<T> {

  /** Returns the captured type. */
  final Type capture() {
    Type superclass = getClass().getGenericSuperclass();

   * }</pre>
   */
  protected TypeToken(Class<?> declaringClass) {
    Type captured = super.capture();
    if (captured instanceof Class) {
      this.runtimeType = captured;
    } else {
      this.runtimeType = TypeResolver.covariantly(declaringClass).resolveType(captured);
    }
  }

  private TypeToken(Type type) {
    this.runtimeType = checkNotNull(type);
  }

  static final Integer N3 = 3;
  static final Integer N4 = 4;
  static final Integer N5 = 5;
  static final Integer NODE_NOT_IN_GRAPH = 1000;

  // TODO(user): Consider separating Strings that we've defined here to capture
  // identifiable substrings of expected error messages, from Strings that we've defined
  // here to provide error messages.
  // TODO(user): Some Strings used in the subclasses can be added as static Strings
  // here too.

          return new Type[] {new TypeCapture<P>() {}.capture()};
        }

        @Override
        public Type getOwnerType() {
          return new TypeCapture<O>() {}.capture();
        }

        @Override
        public Type getRawType() {
          return new TypeCapture<T>() {}.capture();
        }
      };
    }
  }

    Set<SomeEnum> units = Stream.<SomeEnum>empty().collect(Sets.toImmutableEnumSet());
    assertThat(units).isEmpty();
  }

  public void testToImmutableEnumSetReused() {
    // The method call lets us capture the accumulator as an A and invoke the callbacks manually
    genericTestToImmutableEnumSetReused(Sets.<SomeEnum>toImmutableEnumSet());
  }