* </ul>
 *
 * <p>Children combination modes (specified by {@code combine.children} attribute):</p>
 * <ul>
 *   <li>{@code merge} (default): Merges elements with matching names</li>
 *   <li>{@code append}: Adds elements as siblings</li>
 * </ul>
 *
 * <p>Self combination modes (specified by {@code combine.self} attribute):</p>
 * <ul>
 *   <li>{@code merge} (default): Merges attributes and values</li>

	}
	ch := make(chan Response, 1)
	m.respMu.Lock()
	if m.closed {
		m.respMu.Unlock()
		return nil, ErrDisconnected
	}
	m.respWait = ch
	m.respMu.Unlock()
	ctx := m.ctx

	// Add deadline if none.
	if msg.DeadlineMS == 0 {
		msg.DeadlineMS = uint32(defaultSingleRequestTimeout / time.Millisecond)
		var cancel context.CancelFunc
		ctx, cancel = context.WithTimeout(ctx, defaultSingleRequestTimeout)

W™oWZåKZD_³I\ã Hs7o]f_@é–rD}vƒ±<ê Hº}ñre¸osQZôu^] poMßseòxiDq]p®ö^ » %eOrñs{Bv€¡ûp@oK]^ô „TW`¼ ûR? ¨[tˆˆ‚«æq@Œ+_lpkSIˆ^ñ @I¾¦fW pPc{^<ˆâïò û@ ; OPmyßt}æ^IªêVkq ^pu²vñ^Ty[Sxi8¿l ’Œ€à@DK~Ô^zÜJ ¨™1|vž}û\–iY»ÕmP\ep—÷SlûY¡\ïTmG_s™Ùs`H{_}©GEì´Œ»SqòSa¸ïL}ÂbDR^Ì ÕO„V^e¼Bñjhñqkxé°{W_÷E@JˆVk<‚Åò y¦Õ^kh~ ô[Rg¢?qr› †ÕsHrïpŠQR¾xPe¨¹yndñ E¾Ri]Ü ª m|jqme¨àr 2Jdª}gVPªzæi¾LK^j¼VU VdC²HHg@e¼Yp8ì[Negz{Öa€uV¢Qrûcf¼csM¼SGTܤ%ûX; „^y²IRñre¸fO^ š -oCˆuMIV„åjypge†À¬õ Èû8}ûz}ô¼o~ t{_qLOrs|ôŠLurmmNmX˾@{ jsò*ñCixW{V sB ^...

func (s *lruStore) Get(key string) (*Stmt, bool) {
	stmt, ok := s.lru.Get(key)
	if ok && stmt != nil {
		<-stmt.prepared
	}
	return stmt, ok
}

func (s *lruStore) Set(key string, value *Stmt) {
	s.lru.Add(key, value)
}

func (s *lruStore) Delete(key string) {
	s.lru.Remove(key)
}

type ConnPool interface {
	PrepareContext(ctx context.Context, query string) (*sql.Stmt, error)
}

		b.debugf("returning existing %v", o.ID)
		return c
	}

	if !o.Create {
		return metacache{
			id:     o.ID,
			bucket: o.Bucket,
			status: scanStateNone,
		}
	}

	// Create new and add.
	best := o.newMetacache()
	b.caches[o.ID] = best
	b.cachesRoot[best.root] = append(b.cachesRoot[best.root], best.id)
	b.updated = true
	b.debugf("returning new cache %s, bucket: %v", best.id, best.bucket)

	}
	if size == 0 {
		return nil
	}
	if !c.Type.Is(other.Type.Base()) {
		return fmt.Errorf("checksum type does not match got %s and %s", c.Type.String(), other.Type.String())
	}
	// If never set, just add first checksum.
	if len(c.Raw) == 0 {
		c.Raw = other.Raw
		c.Encoded = other.Encoded
		return nil
	}
	if !c.Valid() {
		return fmt.Errorf("invalid base checksum")
	}
	if !other.Valid() {

You type the first parameter of the function, `first_name`, then a dot (`.`) and then hit `Ctrl+Space` to trigger the completion.

But, sadly, you get nothing useful:

<img src="/img/python-types/image01.png">

### Add types { #add-types }

Let's modify a single line from the previous version.

We will change exactly this fragment, the parameters of the function, from:

```Python
    first_name, last_name
```

to:

### Custom OpenAPI *path operation* schema { #custom-openapi-path-operation-schema }

The dictionary in `openapi_extra` will be deeply merged with the automatically generated OpenAPI schema for the *path operation*.

So, you could add additional data to the automatically generated schema.

// Supported status types
const (
	Enabled  Status = "Enabled"
	Disabled Status = "Disabled"
)

// DeleteMarkerReplication - whether delete markers are replicated - https://docs.aws.amazon.com/AmazonS3/latest/dev/replication-add-config.html
type DeleteMarkerReplication struct {
	Status Status `xml:"Status"` // should be set to "Disabled" by default
}

// IsEmpty returns true if DeleteMarkerReplication is not set

            List<Artifact> artifacts =
                    resolveExtension(extension, repoSession, repositories, dependencyFilter, interpolator);
            if (!artifacts.isEmpty()) {
                extensions.add(createExtension(extension, artifacts));
            }
        }

        return Collections.unmodifiableList(extensions);
    }