What problem would the enhancement address for VIP?

The function get_theme_file_path should not trigger as a warning when including files. get_theme_file_path uses get_stylesheet_directory and get_template_directory in the function which are both already allowed.

Describe the solution you'd like

Add get_theme_file_path to the $getPathFunctions property of the WordPressVIPMinimum\Sniffs\Files\IncludingFileSniff sniff.

What code should be reported as a violation?

N/A

What code should not be reported as a violation?

require_once get_theme_file_path( 'includes/custom-theme-file.php' );