// Check base capabilities to be supported by the server
final Sets.SetView<String> unknownBaseCaps = Sets.difference(baseCapabilities, DEFAULT_BASE_CAPABILITIES);
Preconditions.checkArgument(unknownBaseCaps.isEmpty(),
// Check base capabilities to be supported by the server
final Sets.SetView<String> unknownBaseCaps = Sets.difference(baseCapabilities, DEFAULT_BASE_CAPABILITIES);
Preconditions.checkArgument(unknownBaseCaps.isEmpty(),