rem: _hasSingleTextChild: function (el) { return (el.childNodes.length == 1 && el.childNodes[0].nodeType == 3); } 
add: },_hasSingleTextChild:function(el){ return (el.childNodes.length==1&&el.childNodes[0].nodeType==3); }}; 
context:     _hasSingleTextChild: function (el) {        return (el.childNodes.length == 1 && el.childNodes[0].nodeType == 3);    }
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