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

        me.length = 0;
        me.items.length = 0;
        me.keys.length = 0;
        me.all.length = 0;
        me.dirtyIndices = true;
        me.indices = {};
        me.map = {};
    }
function(){
        var me = this;

        me.length = 0;
        me.items.length = 0;
        me.keys.length = 0;
        me.all.length = 0;
        me.dirtyIndices = true;
        me.indices = {};
        me.map = {};
    }
Removes all items from the collection. Fires the {@link #clear} event when complete.