src/class-wp-register.php
public static function add_styles() {

		self::look_if_process_files( 'style' );

		foreach ( self::$data['style'] as $data ) {

			wp_register_style(
				$data['name'],
				$data['url'],
				$data['deps'],
				$data['version'],
				$data['media']
			);

			wp_enqueue_style( $data['name'] );
		}
	}
public static function add_styles() {

		self::look_if_process_files( 'style' );

		foreach ( self::$data['style'] as $data ) {

			wp_register_style(
				$data['name'],
				$data['url'],
				$data['deps'],
				$data['version'],
				$data['media']
			);

			wp_enqueue_style( $data['name'] );
		}
	}
Add register and enqueue styles.