WP_Upgrader_Skin::set_upgrader( WP_Upgrader $upgrader )

Source

File: wp-admin/includes/class-wp-upgrader-skin.php

public function set_upgrader( &$upgrader ) {
		if ( is_object( $upgrader ) ) {
			$this->upgrader =& $upgrader;
		}
		$this->add_strings();
	}