Cargo Features

paypal-rs has no features set by default.

[dependencies]
paypal-rs = { version = "0.2.6", features = ["rustls"] }
default

These default features are set whenever paypal-rs is added without default-features = false somewhere in the dependency tree.

Enables native-tls of reqwest

reqwest:

Enables native-tls specific functionality not available by default.

rustls

Enables rustls-tls of reqwest

paypal-rs has 2 features without comments.