protected function add_filter( $hook, $method, $priority = 10, $arg_count = 1 ) {
		return add_filter(
			$hook,
			$this->map_filter( $this->get_wp_filter_id( $hook, $method, $priority ), $method, $arg_count ),
			$priority,
			$arg_count
		);
	}
protected function add_filter( $hook, $method, $priority = 10, $arg_count = 1 ) {
		return add_filter(
			$hook,
			$this->map_filter( $this->get_wp_filter_id( $hook, $method, $priority ), $method, $arg_count ),
			$priority,
			$arg_count
		);
	}
protected function add_filter ( $ hook , $ method , $ priority = 10 , $ arg_count = 1 ) { return add_filter ( $ hook , $ this -> map_filter ( $ this -> get_wp_filter_id ( $ hook , $ method , $ priority ) , $ method , $ arg_count ) , $ priority , $ arg_count ) ; }
Add a WordPress filter.

@param  string   $hook
@param  callable $method
@param  int      $priority
@param  int      $arg_count
@return bool true
Add a WordPress filter .