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// A sample logging function to be added to a callbacks list
var foo = function( value ) {
  console.log( value );
};
var callbacks = $.Callbacks();
// Add the above function to the list
callbacks.add( foo );
// Fire the items on the list
callbacks.fire( "foo" );
// Outputs: foo
// Disable further calls being possible
callbacks.disable();
// Attempt to fire with "foobar" as an argument
callbacks.fire( "foobar" );
// foobar isn't output