wp_has_border_feature_support( WP_Block_Type $block_type, string $feature, mixed $default_value = false ): bool

153function wp_has_border_feature_support( $block_type, $feature, $default_value = false ) {154	// Check if all border support features have been opted into via `"__experimentalBorder": true`.155	if ( $block_type instanceof WP_Block_Type ) {156		$block_type_supports_border = $block_type->supports['__experimentalBorder'] ?? $default_value;157		if ( true === $block_type_supports_border ) {158			return true;159		}160	}161 162	// Check if the specific feature has been opted into individually163	// via nested flag under `__experimentalBorder`.164	return block_has_support( $block_type, array( '__experimentalBorder', $feature ), $default_value );165}