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An abbreviation for (objc:send/maybe-safe RECEIVER KEYWORD ARGUMENT ...). The older @[...] form is deprecated.

For enhanced readability, the bridge accepts hyphenated selector keywords and translates them into their Objective C counterparts by uppercasing any character after a hyphen, then removing the hyphens. For example, the following are equivalent:

(@ NSDictionary dictionary-with-contents-of-file: name)
(@ NSDictionary dictionaryWithContentsOfFile: name)