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renderer : function(value, cell, record, rowIndex, colIndex){
var qtipTpl = new Ext.XTemplate(
'<tpl for=".">',
'<div ext:qtip="{data1}">',
'{data2}</div>',
'</tpl>'
);
var da = {data1:v,data2:value};
return qtipTpl.apply(da);
}