class CFPropertyList::List

def to_str(format=List::FORMAT_BINARY,opts={})

opts={}:: Pass parser options
format = List::FORMAT_BINARY:: The format to save the plist
convert plist to string 
def to_str(format=List::FORMAT_BINARY,opts={})
  prsr = @@parsers[format-1].new
  opts[:root] = @value
  return prsr.to_str(opts)
end