Cargo Features

mz-avro has no features set by default.

mz-avro = { version = "0.7.0", features = ["snappy"] }
snappy = byteorder, crc32fast, snap

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.

byteorder snappy?
crc32fast snappy?
snap snappy?