isUsed(expression)

    /**
     * [isUsed] and [doesParentUseChild] are defined in mutual recursion,
     * climbing up the syntax tree, passing control back and forth between the
     * two.
     *
     * Whether an expression is used is defined by the context in which it
     * appears. E.g. a "statement" in a block is considered used if it is the

    provided that You are in compliance with the terms of this License
    and that the license for the Executable form does not attempt to
    limit or alter the recipient's rights in the Source Code form from
    the rights set forth in this License. If You distribute the Covered
    Software in Executable form under a different license, You must make
    it absolutely clear that any terms which differ from this License

  sufficient copyright rights in its Contribution, if any, to grant
  the copyright license set forth in this Agreement.

  e) Notwithstanding the terms of any Secondary License, no
  Contributor makes additional grants to any Recipient (other than
  those set forth in this Agreement) as a result of such Recipient's
  receipt of the Program under the terms of a Secondary License

    /**
     * Returns a [KaScope] containing the *static* callables (functions and properties) and all classifiers (classes and objects) explicitly
     * declared in the given [KaSymbolWithMembers].
     *
     * It is worth noting that, while Java classes may contain declarations of static callables freely, in Kotlin only enum classes define