# File lib/brakeman/processors/lib/find_return_value.rb, line 59
  def find_explicit_return_values exp
    todo = [exp]

    until todo.empty?
      current = todo.shift

      @uses_ivars = true if node_type? current, :ivar

      if node_type? current, :return
        @return_values << last_value(current.value) if current.value
      elsif sexp? current
        todo = current[1..-1].concat todo
      end
    end
  end