Cargo Features

morsels_common has no features set by default.

[dependencies]
morsels_common = { version = "0.7.3", features = ["indexer"] }
indexer = serde

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.

serde indexer?