# File lib/hashery/sparsearray.rb, line 316
  def insert(index, *objs)
    index = size + index + 1 if index < 0
    tail = self[index...size]
    objs.each_with_index do |obj, i|
      set(index + i, obj)
    end
    tail.each_with_index do |obj, i|
      set(objs.size + index + i, obj)
    end
    self
  end