[Snippet rust]
```rust
fn try_from(issuer: utils::CardIssuer) -> Result<Self, Self::Error> {
        match issuer {
            utils::CardIssuer::AmericanExpress => Ok(Self::Amex),
            utils::CardIssuer::Master => Ok(Self::MasterCard),
            utils::CardIssuer::Discover => Ok(Self::Discover),
```
Path: hyperswitch/crates/hyperswitch_connectors/src/connectors/worldline/transformers.rs :: try_from (function, crate=hyperswitch_connectors)

Negatives:
- hyperswitch/crates/common_utils/src/types.rs :: to_minor_unit_as_string
- hyperswitch/crates/hyperswitch_connectors/src/connectors/payload.rs :: get_request_body
- hyperswitch/crates/hyperswitch_connectors/src/connectors/signifyd.rs :: common_get_content_type
- hyperswitch/crates/router/src/core/payouts.rs :: payouts_retrieve_core
- hyperswitch/crates/hyperswitch_connectors/src/connectors/inespay.rs :: get_webhook_body