# Extensibility in WooCommerce Blocks These documents are all dealing with extensibility in the various WooCommerce Blocks. ## Checkout Block | Document | Description | | ---------- | ---------- | [Payment Method Integration](./payment-method-integration.md) | Information about implementing payment methods. [Checkout Flow and Events](./checkout-flow-and-events.md) | All about the checkout flow in the checkout block and the various emitted events that can be subscribed to. [Available Filters](./available-filters.md) | All about the filters that you may use to change values of certain elements of WooCommerce Blocks.