withMixins
When you actually use mixins to create components or features, you'll likely want to inherit from multiple mixins. To do this, you would do it like this:
Resolving Method-Name Collisions at the Call Site
Some mixins expose a configurable method name instead of a hardcoded one — @geastack-community/query's withQuery is one (see Configurable Method Names for Ecosystem Interoperability for why library authors build mixins this way). As a consumer, you'll only ever need to reach for this when two mixins you're combining would otherwise install a method under the exact same name.
Composition Order in Practice
withMixins covers the syntax; Composition Order and the Dispose Chain covers why order affects cleanup, from a mixin author's perspective. This page is the short, practical version for anyone just consuming mixins in an application.