*
   * @throws UnsupportedOperationException always
   * @deprecated Unsupported operation.
   */
  @Deprecated
  @Override
  @DoNotCall("Always throws UnsupportedOperationException")
  public final void clear() {
    throw new UnsupportedOperationException();
  }

  /**
   * Returns an {@code ImmutableList} containing the same elements, in the same order, as this
   * collection.
   *

 */
package org.codelibs.fess.opensearch.config.cbean.ca.bs;

import org.codelibs.fess.opensearch.config.allcommon.EsAbstractConditionAggregation;
import org.codelibs.fess.opensearch.config.allcommon.EsAbstractConditionQuery;
import org.codelibs.fess.opensearch.config.cbean.ca.WebConfigCA;
import org.codelibs.fess.opensearch.config.cbean.cq.WebConfigCQ;
import org.codelibs.fess.opensearch.config.cbean.cq.bs.BsWebConfigCQ;

                        return OptionalThing.empty();
                    }
                };
            }
        };
        envMap.clear();
        systemHelper.init();
        systemHelper.addShutdownHook(() -> {});
        ComponentUtil.register(systemHelper, "systemHelper");
    }

    public void test_getUsername() {

   */
  @CanIgnoreReturnValue
  Collection<V> removeAll(@CompatibleWith("K") @Nullable Object key);

  /** Removes all key-value pairs from the multimap, leaving it {@linkplain #isEmpty empty}. */
  void clear();

  // Views

  /**
   * Returns a view collection of the values associated with {@code key} in this multimap, if any.

pkg net, method (*ListenConfig) MultipathTCP() bool #56539
pkg net, method (*ListenConfig) SetMultipathTCP(bool) #56539
pkg net, method (*TCPConn) MultipathTCP() (bool, error) #59166
pkg reflect, method (Value) Clear() #55002
pkg reflect, type SliceHeader //deprecated #56906
pkg reflect, type StringHeader //deprecated #56906
pkg regexp, method (*Regexp) MarshalText() ([]uint8, error) #46159

            int len;
            int amount = 0;
            while ((len = ChannelUtil.read(channel, buffer, amount)) != -1) {
                out.write(buf, 0, len);
                buffer.clear();
                amount += len;
            }
            out.flush();
            return amount;
        } catch (final IOException e) {
            throw new IORuntimeException(e);
        }

            indexingHelper.deleteDocumentByUrl(searchEngineClient, url);
        }
        if (logger.isDebugEnabled()) {
            logger.debug("Deleted {}", deleteUrlList);
        }
        deleteUrlList.clear();
    }

    @Override
    public long getDocumentSize() {
        return indexUpdateCallback.getDocumentSize();
    }

    @Override
    public long getExecuteTime() {

    rangeMap.put(Range.open(3, 7), 1);
    rangeMap.put(Range.closed(9, 10), 2);
    rangeMap.put(Range.closed(12, 16), 3);
    RangeMap<Integer, Integer> sub = rangeMap.subRangeMap(Range.closed(5, 11));
    sub.clear();
    assertEquals(
        ImmutableMap.of(Range.open(3, 5), 1, Range.closed(12, 16), 3), rangeMap.asMapOfRanges());
  }

  public void testCopyOfTreeRangeMap() {

        // We only ever register ArrayReferences with the queue so this is always safe.
        ArrayReference<? extends L> arrayRef = (ArrayReference<? extends L>) ref;
        // Try to clear out the array slot, n.b. if we fail that is fine, in either case the
        // arrayRef will be out of the array after this step.
        locks.compareAndSet(arrayRef.index, arrayRef, null);
      }
    }

			adminRouter.Methods(http.MethodDelete).Path(adminVersion+"/clear-config-history-kv").HandlerFunc(adminMiddleware(adminAPI.ClearConfigHistoryKVHandler)).Queries("restoreId", "{restoreId:.*}")