}

        // AuthSchemeFactory
        final RegistryBuilder<AuthSchemeProvider> authSchemeProviderBuilder = RegistryBuilder.create();
        @SuppressWarnings("unchecked")
        final Map<String, AuthSchemeProvider> factoryMap =
                getInitParameter(AUTH_SCHEME_PROVIDERS_PROPERTY, authSchemeProviderMap, Map.class);
        if (factoryMap != null) {

          case OPEN:
            break;
        }
        throw new AssertionError(status);
      }
      future.addListener(() -> provideValueAndCloser(consumer, this), executor);
    }

    @SuppressWarnings("Interruption") // We are propagating an interrupt from a caller.
    boolean cancel(boolean mayInterruptIfRunning) {
      logger.get().log(FINER, "cancelling {0}", closingFutureToString());

the compiler, e.g. suppressing type-checking, raw generics, and so on. However,
this isn't always possible or practical. In such cases, you should use the
`@SuppressWarnings` annotations to silence the compiler warning, trying to keep
the scope of the suppression as small as possible. Where a piece of code
requires a lot of suppressions, it may be better to apply a single suppression

                logger.debug("Set custom authentication strategy with NTLM support for target and proxy");
            }
        }

        // Add any explicitly configured factories (may override defaults)
        @SuppressWarnings("unchecked")
        final Map<String, AuthSchemeFactory> factoryMap = getInitParameter(AUTH_SCHEME_PROVIDERS_PROPERTY, authSchemeFactoryMap, Map.class);
        if (factoryMap != null && !factoryMap.isEmpty()) {

  // Non-static factories

  /** Returns a matcher that matches any character not matched by this matcher. */
  // This is not an override in java7, where Guava's Predicate does not extend the JDK's Predicate.
  @SuppressWarnings("MissingOverride")
  public CharMatcher negate() {
    return new Negated(this);
  }

  /**
   * Returns a matcher that matches any character matched by both this matcher and {@code other}.
   */