lib/utils.js
function(obj, extObj) {
        this.each(extObj, function(value, key) {
            if (extObj.hasOwnProperty(key)) obj[key] = value
        })
        return obj
    }
function(obj, extObj) {
        this.each(extObj, function(value, key) {
            if (extObj.hasOwnProperty(key)) obj[key] = value
        })
        return obj
    }
function ( obj , extObj ) { this . each ( extObj , function ( value , key ) { if ( extObj . hasOwnProperty ( key ) ) obj [ key ] = value } ) return obj }
Merge for extObj to obj
Merge for extObj to obj