Interface to represent a plugin license.
get_license_key()
exists()
is_active()
is_valid()
get_item_id()
activate( $license_key)
deactivate()
refresh()
override( $license_key, $status)
is_expired()
is_disabled()
is_inactive()
get_status()
get_status_help_text()
get_active_url()
has_site_moved()
get_renewal_url( $apply_discount = true)
get_setting_name()