Cargo Features

[dependencies]
merge-opt = { version = "0.1.0", default-features = false, features = ["i10"] }
default = i10, i3, i4, i5, i6, i7, i8, i9

These default features are set whenever merge-opt is added without default-features = false somewhere in the dependency tree.

i3 i4 i5 i6 i7 i8 i9 i10 default

merge-opt has 2 features without comments.