lib/Ext/util/AbstractMixedCollection.js
function(){
        var me = this;

        me.length = 0;
        me.items = [];
        me.keys = [];
        me.map = {};
        me.fireEvent('clear');
    }
function(){
        var me = this;

        me.length = 0;
        me.items = [];
        me.keys = [];
        me.map = {};
        me.fireEvent('clear');
    }
Removes all items from the collection.  Fires the `{@link #event-clear}` event when complete.