> ## Documentation Index
> Fetch the complete documentation index at: https://docs.crossmint.com/llms.txt
> Use this file to discover all available pages before exploring further.

# CrossmintPaymentMethodManagementLoadingBuilder

> Flutter Type Alias

**Type Alias**

Builder signature for the overlay rendered on top of the hosted payment-method-management WebView while the hosted page is loading. Consumers can supply a custom builder via `CrossmintPaymentMethodManagement.loadingBuilder` to swap the default Material spinner for their own design-system loading state. Mirrors the `CrossmintCheckoutLoadingBuilder` pattern exposed by `CrossmintEmbeddedCheckout`.

```dart theme={null}
typedef CrossmintPaymentMethodManagementLoadingBuilder = Widget Function(BuildContext context)
```