Cargo Features

xmltree has no features set by default.

[dependencies]
xmltree = { version = "0.10.3", features = ["attribute-order"] }
attribute-order = indexmap

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.

indexmap attribute-order?

Enables indexmap ^1.4.0