Look at PHP7.0-7.3 features we could benefit from using

[jakejackson1]

Research required.

[jakejackson1]

1. Strict types declare( strict_types=1 );
2. Type hinting and return types function get_uploaded_font_files( WP_REST_Request $request ): array
3. null coalescing operator ??
4. Group use declations
5. Class constant visiblity
6. Multi-catch exceptions
7. Callable to closure