Cargo Features

[dependencies]
cumulus-test-relay-sproof-builder = { version = "0.16.0", default-features = false, features = ["std"] }
default = std

The std feature is set by default whenever cumulus-test-relay-sproof-builder is added without default-features = false somewhere in the dependency tree.

std default

Enables std of parity-scale-codec, cumulus-primitives-core, polkadot-primitives, sp-runtime, sp-state-machine, and sp-trie

cumulus-test-relay-sproof-builder has 2 features without comments.