class Opal::Nodes::HashNode

def initialize(*)
  super
  @has_kwsplat = false
  @keys = []
  @values = []
  children.each do |child|
    case child.type
    when :kwsplat
      @has_kwsplat = true
    when :pair
      @keys << child.children[0]
      @values << child.children[1]
    end
  end
end