create_data_type("vim.host.VirtualSwitch.Specification", "HostVirtualSwitchSpec", "vmodl.DynamicData", "vim.version.version1", [["numPorts", "int", "vim.version.version1"], ["bridge", "vim.host.VirtualSwitch.Bridge", "vim.version.version1", {:optional => true}], ["policy", "vim.host.NetworkPolicy", "vim.version.version1", {:optional => true}], ["mtu", "int", "vim.version.version2", {:optional => true}]])