Toggle maintenance mode for the site.

Releases an upgrader lock.

Run an upgrade/installation.

Unpack a compressed package file.

Filters whether the upgrader cleared the destination.

Filters the result of WP_Upgrader::install_package().

Filters the package options before running an update.

Filters the installation response after the installation has finished.

Filters whether to return the package.

Filters the installation response before the installation has started.