do_action( 'plugins_loaded' )
Fires once activated plugins have loaded.
Pluggable functions are also available at this point in the loading order.
The hook is generally used for immediate filter setup, or plugin overrides.
plugins_loaded action hook fires early, and precedes the
wp_loaded action hooks.
View all references
do_action( 'plugins_loaded' );
Example migrated from Codex:
you can use instance method when load plugin