Update example usage in README.md

README.md

@@ -22,31 +22,45 @@ own.
 ## Example Usage
 
 ```go
+package main
+
+import (
+	"context"
+	"log"
+	"net"
+
+	"github.com/jackc/puddle/v2"
+)
+
+func main() {
 	constructor := func(context.Context) (net.Conn, error) {
 		return net.Dial("tcp", "127.0.0.1:8080")
 	}
 	destructor := func(value net.Conn) {
 		value.Close()
 	}
-maxPoolSize := 10
+	maxPoolSize := int32(10)
 
-pool := puddle.NewPool[net.Conn](&puddle.Config[int]{Constructor: constructor, Destructor: destructor, MaxSize: maxPoolSize})
+	pool, err := puddle.NewPool(&puddle.Config[net.Conn]{Constructor: constructor, Destructor: destructor, MaxSize: maxPoolSize})
+	if err != nil {
+		log.Fatal(err)
+	}
 
 	// Acquire resource from the pool.
 	res, err := pool.Acquire(context.Background())
 	if err != nil {
-  // ...
+		log.Fatal(err)
 	}
 
 	// Use resource.
 	_, err = res.Value().Write([]byte{1})
 	if err != nil {
-  // ...
+		log.Fatal(err)
 	}
 
 	// Release when done.
 	res.Release()
-
+}
 ```
 
 ## Status