tree f66bc016630d2ee78d6bbeed597fbe5b4bb7da56
parent 52e219581f72a3eac013d6f5550c580962677425
author Lasse R.H. Nielsen <lrn@google.com> 1601392058 +0200
committer GitHub <noreply@github.com> 1601392058 +0200
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General clean-up and tweaks. (#157)

* General clean-up and tweaks.

Fixes some null-safety issues, usees some newer features (const classes can use mixins now),
and replaces unnecessary `late` with a dual constructor.

Fixes the `CombinedList.iterator` having potentially quadratic complexity
since the default list iterator does repeated indexing.

Ensure that interfaces returning an `Iterable` does not return a `Set` instead.