Scala 2.12 mutable Stack API documentation (source code)

= Scala 2.12 mutable Stack API documentation
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https://www.scala-lang.org/api/2.12.6/scala/collection/mutable/Stack.html

Official historical API documentation for the mutable <stack>: the empty constructor, `push`, `pop` and `nonEmpty` support an explicit <inorder traversal> stack. The API's deprecation notices concern later collection choices; they do not remove these documented operations from the cited version.