*/
    private Map<String, List<String>> headers;

    /**
     * Closes the content cache if it is not null.
     *
     * @throws IOException if an I/O error occurs.
     */
    @Override
    public void close() throws IOException {
        if (contentCache != null) {
            contentCache.close();
        }
    }

    /**

            return null;
        }
    }

    /**
     * If the class is a primitive type, returns its wrapper class.
     *
     * @param className
     *            The class name. Must not be {@literal null} or empty.
     * @return {@link Class}
     * @throws EmptyArgumentException
     *             If the class name is {@literal null} or empty.

        return null;
    }

    @Override
    protected String createFromHint() {
        return null;
    }

    @Override
    protected String createSqlSuffix() {
        return null;
    }

    @Override
    public void fetchFirst(int fetchSize) {
        _fetchScopeEffective = true;
        if (fetchSize < 0) {
            String msg = "Argument[fetchSize] should be plus: " + fetchSize;

        return null;
    }

    @Override
    protected String createFromHint() {
        return null;
    }

    @Override
    protected String createSqlSuffix() {
        return null;
    }

    @Override
    public void fetchFirst(int fetchSize) {
        _fetchScopeEffective = true;
        if (fetchSize < 0) {
            String msg = "Argument[fetchSize] should be plus: " + fetchSize;

        return toBigInteger(o, null);
    }

    /**
     * Converts to {@link BigInteger}.
     *
     * @param o
     *            The object to convert
     * @param pattern
     *            The pattern string
     * @return The converted {@link BigInteger}
     */
    public static BigInteger toBigInteger(final Object o, final String pattern) {
        if (o == null) {
            return null;

ame":"dillon","roleArn":"arn:minio:iam:::role/nOybJqMNzNmroqEKq5D0","sa-policy":"inherited-policy","sub":"Cit1aWQ9ZGlsbG9uLG91"},"sessionPolicy":null,"status":"on","name":"","description":"","expiration":"1970-01-01T00:00:00Z"},"dillon-svcacct-1":{"parent":"oCnAoSQFtdVQtKwrB73j","accessKey":"dillon-svcacct-1","secretKey":"dillon-svcacct-1","groups":null,"claims":{"accessKey":"dillon-svcacct-1","parent":"oCnAoSQFtdVQtKwrB73j","sa-policy":"embedded-policy","sessionPolicy":"eyJWZXJzaW9uIjoiIiwi==",...

                    Class<?> clazz = MockMultiThreadedHttpConnectionManager.class;
                    Method method = clazz.getMethod("shutdownAll", (Class<?>[]) null);
                    method.invoke(null, (Object[]) null);
                } catch (Exception e) {
                    // Exception should be caught and logged
                    exceptionHandled.set(true);
                }
            }

    Converter<String, Number> converter = Converter.<String, Number>from(forward, backward);

    assertNull(converter.convert(null));
    assertNull(converter.reverse().convert(null));

    assertEquals((Integer) 5, converter.convert("5"));
    assertEquals("5", converter.reverse().convert(5));
  }

  // Null-passthrough violates our nullness annotations, so we don't support it under J2KT.
  @J2ktIncompatible

    int initialSize = collection.size();
    assertTrue("remove(null) should return true", collection.remove(null));
    assertEquals(
        "remove(present) should decrease a collection's size by one.",
        initialSize - 1,
        collection.size());
    expectMissing((E) null);
  }

  @CollectionFeature.Require(absent = SUPPORTS_REMOVE)
  @CollectionSize.Require(absent = ZERO)

            getMap()
                .computeIfAbsent(
                    null,
                    k -> {
                      assertNull(k);
                      return v3();
                    }));
    expectUnchanged();
    expectNullKeyMissingWhenNullKeysUnsupported(
        "Should not contain null key after unsupported computeIfAbsent(null, function)");
  }