TiddlyWiki.prototype.tiddlerExists

The tiddlerExists method of a TiddlyWiki class object returns whether a tiddler exists in the TiddlyWiki. If a shadow tiddler exists for the title, it will return true. This method expects one parameter: the title of the tiddler.
It is used like so:

// store is the TiddlyWiki class
store.tiddlerExists('TiddlerExists');

Which returns "true"