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Style error in grid docked container
...
dockedItems: [{        xtype:'container',
        html:'truehtml',
        id:'summaryBlock',
        dock:'bottom',
        layout:'fit'
}], ...

...setHeight : function(height, animate){            var me = this;
        height = me.adjustHeight(height);
        if (!animate || !me.anim) {
            me.dom.style.height = me.addUnits(height);Uncaught TypeError: Cannot read property 'style' of undefined


        }