class Sass::Tree::IfNode

def self._load(data)
  expr, else_, children = Marshal.load(data)
  node = IfNode.new(expr)
  node.else = else_
  node.children = children
  node.instance_variable_set('@last_else',
    node.else ? node.else.instance_variable_get('@last_else') : node)
  node
end