}

    @Override
    public boolean remove(@Nullable Object o) {
      try {
        return super.remove(o);
      } catch (UnsupportedOperationException e) {
        for (Entry<K, V> entry : map().entrySet()) {
          if (Objects.equals(o, entry.getValue())) {
            map().remove(entry.getKey());
            return true;
          }
        }

        pendingOperations.add(operation);
    }

    /**
     * Remove a pending operation
     *
     * @param operation operation to remove
     * @return true if operation was removed
     */
    public boolean removePendingOperation(CommonServerMessageBlock operation) {
        return pendingOperations.remove(operation);
    }

    /**
     * Clear all pending operations
     */

   * formally, removes an element {@code e} such that {@code o.equals(e)}, if this queue contains
   * one or more such elements. Returns {@code true} if this queue contained the specified element
   * (or equivalently, if this queue changed as a result of the call).
   *
   * @param o element to be removed from this queue, if present
   * @return {@code true} if this queue changed as a result of the call
   */
  @CanIgnoreReturnValue
  @Override

        assertWagon("c");

        assertWagon("string");

        assertThrows(UnsupportedProtocolException.class, () -> assertWagon("d"));
    }

    /**
     * Check that transfer listeners are properly removed after getArtifact and putArtifact
     */
    @Test
    void testWagonTransferListenerRemovedAfterGetArtifactAndPutArtifact() throws Exception {

    }

    @Override
    public boolean remove(@Nullable Object o) {
      try {
        return super.remove(o);
      } catch (UnsupportedOperationException e) {
        for (Entry<K, V> entry : map().entrySet()) {
          if (Objects.equals(o, entry.getValue())) {
            map().remove(entry.getKey());
            return true;
          }
        }

			iamLogIf(ctx, err)
		}
		// No need to return errors for failed expiration of STS users
	}

	// Loading the STS policy mappings from disk ensures that stale entries
	// (removed during loadUser() in the loop above) are removed from memory.
	for _, item := range listedConfigItems[policyDBSTSUsersListKey] {
		stsName := strings.TrimSuffix(item, ".json")

#### Per-Connection Locks

Each connection has its own lock. The connections in the pool are all in a `ConcurrentLinkedQueue`. Due to data races, iterators of this queue may return removed connections. Callers must check the connection's `noNewExchanges` property before using connections from the pool.

The connection lock is never held while doing I/O (even closing a socket) to prevent contention.

	OpRequest

	// OpResponse is a response to a single request.
	// FlagPayloadIsErr is used to signify that the payload is a string error converted to byte slice.
	// When a response is received, the mux is already removed from the remote.
	OpResponse

	// OpDisconnect instructs that remote wants to disconnect
	OpDisconnect

	// OpMerged is several operations merged into one.
	OpMerged
)

const (

arcfour256
arcfour128
arcfour
aes128-cbc
3des-cbc
```

`--sftp=mac-algos=...` specifies a default set of MAC algorithms in preference order.
This is based on RFC 4253, section 6.4, but with hmac-md5 variants removed because they have 
reached the end of their useful life.

Valid values: 

```
******@****.***
******@****.***
hmac-sha2-256
hmac-sha2-512
hmac-sha1
hmac-sha1-96

   * Multimap#asMap()} will iterate through the keys in the order that they were first added to the
   * multimap, save that if all values associated with a key are removed and then the key is added
   * back into the multimap, that key will come last in the key iteration order.
   */
  public static MultimapBuilderWithKeys<@Nullable Object> linkedHashKeys() {