woocommerce_before_edit_attribute_fields action-hook . WC 1.0

Usage

add_action( 'woocommerce_before_edit_attribute_fields', 'action_function_name_2069' );
function action_function_name_2069(){
	// action...
}

Where the hook is called

<?php do_action( 'woocommerce_before_edit_attribute_fields' ); ?>

Where in WP core the hook is used WooCommerce