Added docs to the lazy plugin

x-pack/plugins/lists/public/exceptions/components/builder/index.tsx

@@ -8,6 +8,7 @@
 import { EuiLoadingSpinner } from '@elastic/eui';
 import React, { Suspense, lazy } from 'react';
 
+// Note: Only use import type/export type here to avoid pulling anything non-lazy into the main plugin and increasing the plugin size
 import type { ExceptionBuilderProps } from './exception_items_renderer';
 export type { OnChangeProps } from './exception_items_renderer';
 
@@ -16,6 +17,11 @@ interface ExtraProps {
   idAria: string;
 }
 
+/**
+ * This lazy load allows the exception builder to pull everything out into a plugin chunk.
+ * You want to be careful of not directly importing/exporting things from exception_items_renderer
+ * unless you use a import type, and/or a export type to ensure full type erasure
+ */
 const ExceptionBuilderComponentLazy = lazy(() => import('./exception_items_renderer'));
 export const getExceptionBuilderComponentLazy = (
   props: ExceptionBuilderProps & ExtraProps