public function load_extensions() {
		$extensions = [
			new \Frozzare\Digster\Extensions\Filter_Extensions(),
			new \Frozzare\Digster\Extensions\Function_Extensions(),
			new \Frozzare\Digster\Extensions\Global_Extensions(),
			new \Frozzare\Digster\Extensions\I18n_Extensions()
		];

		/**
		 * Modify extensions or add custom.
		 *
		 * @param array $extensions
		 */
		$extensions = apply_filters( 'digster/extensions', $extensions );

		// Register extensions with engine.
		$this->factory->engine()->register_extensions( $extensions );
	}