Check out example codes for "rust cargo.toml dependencies". It will help you in understanding the concepts better.

Code Example 1

[dependencies]
time = "0.1.12"

//Sometimes in the command line you need to update with cargo update and
//then cargo build

Code Example 2

[features]
my-feature = ["crate/crate-feature"]

Learn ReactJs, React Native from akashmittal.com