Is there a way to limit the number of tags a user can add to an input field using Select2?

I have:

$('#tags').select2({

    containerCssClass: 'supplierTags',

    placeholder: Usual suppliers...,

    minimumInputLength: 2,

    multiple: true,

    tokenSeparators: [,,  ],

    placeholder: 'Usual suppliers...',

            createSearchChoice: function(term, data) {

                if ($(data).filter(function() {

                    return this.name.localeCompare(term) === 0;

                }).length === 0) {

                    return {id: 0, name: term};

                }



            },

    id: function(e) {

        return e.id + : + e.name;

    },

    ajax: {

        url: ROOT + 'Call',

        dataType: 'json',

        type: 'POST',

        data: function(term, page) {

            return {

                call: 'Helpers->tagsHelper',

                q: term

            };

        },

        results: function(data, page) {

            return {

                results: data.tags

            };

        }

    },

    formatResult: formatResult,

    formatSelection: formatSelection,

    initSelection: function(element, callback) {

        var data = [];

        $(element.val().split(,)).each(function(i) {

            var item = this.split(':');

            data.push({

                id: item[0],

                name: item[1]

            });

        });

        callback(data);

    }

});

It would be great if there could be/is a simple parameter like limit: 5 and a callback to fire when the limit is reached.