types

packages/svelte/types/index.d.ts

@@ -1402,6 +1402,11 @@ declare module 'svelte/compiler' {
 			item_name: string;
 			/** List of bindings that are referenced within the expression */
 			references: Binding[];
+			/**
+			 * Optimization path for each blocks: If the parent isn't a fragment and
+			 * it only has a single child, then we can classify the block as being "controlled".
+			 * This saves us from creating an extra comment and insertion being faster.
+			 */
 			is_controlled: boolean;
 		};
 	}