wp-includes/class-wp-customize-widgets.php:168Determines if a widget supports selective refresh.
$id_basestringbool public function is_widget_selective_refreshable( $id_base ) { $selective_refreshable_widgets = $this->get_selective_refreshable_widgets(); return ! empty( $selective_refreshable_widgets[ $id_base ] ); }Introduced in 4.5.0. Unchanged from 6.7.7 through 7.1.0.
Signature, return type and hooks compared across 5 parsed releases.
src/wp-includes/class-wp-customize-widgets.php, and regenerated for each WordPress release so it tracks the code rather than a snapshot of it.