create_data_type("vim.event.HostWwnChangedEvent", "HostWwnChangedEvent", "vim.event.HostEvent", "vim.version.version2", [["oldNodeWwns", "long[]", "vim.version.version2", {:optional => true}], ["oldPortWwns", "long[]", "vim.version.version2", {:optional => true}], ["newNodeWwns", "long[]", "vim.version.version2", {:optional => true}], ["newPortWwns", "long[]", "vim.version.version2", {:optional => true}]])