Cargo Features

ReadWrite has no features set by default.

readwrite = { version = "0.2.0", features = ["tokio", "asyncstd"] }
tokio = pin-project-lite, tokio_dep
asyncstd = futures, pin-project-lite

Features from optional dependencies

In crates that don't use the dep: syntax, optional dependencies automatically become Cargo features. These features may have been created by mistake, and this functionality may be removed in the future.

tokio_dep tokio?

Enables tokio

futures asyncstd?
pin-project-lite asyncstd? tokio?