Cargo Features

StarknetApi has no features set by default.

[dependencies]
starknet_api = { version = "0.14.0-rc.0", features = ["testing"] }
testing = starknet_infra_utils

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.

starknet_infra_utils testing?