wp-includes/class-wp-duotone.php:1203Appends the used block duotone filter declarations to the inline block supports CSS.
public static function output_block_styles() { if ( ! empty( self::$block_css_declarations ) ) { wp_style_engine_get_stylesheet_from_css_rules( self::$block_css_declarations, array( 'context' => 'block-supports', ) ); } }Introduced in 6.3.0. Unchanged from 6.7.7 through 7.1.0.
Signature, return type and hooks compared across 5 parsed releases.
src/wp-includes/class-wp-duotone.php, and regenerated for each WordPress release so it tracks the code rather than a snapshot of it.