src/ProxyManager.php
public function setContainer(ContainerInterface $container)
    {
        $this->container = $container;
        StaticProxy::setContainer($this->container);

        return $this;
    }
public function setContainer(ContainerInterface $container)
    {
        $this->container = $container;
        StaticProxy::setContainer($this->container);

        return $this;
    }
Sets the Container object that provides the actual subjects' instances

@param ContainerInterface $container Instance of a Container (or Service Locator)

@return $this