[Snippet rust]
```rust
fn set_mandate_id(&mut self, new_mandate_id: Option<payments::MandateIds>);
```
Path: hyperswitch/crates/router/src/core/mandate.rs :: set_mandate_id (function, crate=router)

Negatives:
- hyperswitch/crates/scheduler/src/db/process_tracker.rs :: retry_process
- hyperswitch/crates/hyperswitch_connectors/src/connectors/tokenex.rs :: get_currency_unit
- hyperswitch/crates/hyperswitch_connectors/src/connectors/worldpayxml.rs :: get_supported_payment_methods
- hyperswitch/crates/hyperswitch_interfaces/src/api.rs :: handle_response
- hyperswitch/crates/router/tests/connectors/amazonpay.rs :: should_sync_manually_captured_refund