helper.scala

  def isCaseClass(tree: Tree): Boolean = {
    tree.is[Defn.Class] && tree.children.exists(_.is[Mod.Case]) ||
      tree.parent.exists(_.is[Defn.Class]) && tree.parent.exists(_.children.exists(_.is[Mod.Case]))
  }

  def isCaseObject(tree: Tree): Boolean = {
    tree.is[Defn.Object] && tree.children.exists(_.is[Mod.Case]) ||
      tree.parent.exists(_.is[Defn.Object]) && tree.parent.exists(_.children.exists(_.is[Mod.Case]))
  }

  def isFinalClass(tree: Tree): Boolean = {
    tree.is[Defn.Class] && tree.children.exists(_.is[Mod.Final]) ||
      tree.parent.exists(_.is[Defn.Class]) && tree.parent.exists(_.children.exists(_.is[Mod.Final]))
  }

  def isBasicClass(tree: Tree): Boolean = {
    tree.is[Defn.Class] && !tree.children.exists(e => e.is[Mod.Final] || e.is[Mod.Case]) ||
      tree.parent.exists(_.is[Defn.Class]) && !tree.parent.exists(_.children.exists(e => e.is[Mod.Final] || e.is[Mod.Case]))
  }