| 123456789101112131415161718192021 | var forEach = require('../array/forEach');var slice = require('../array/slice');var forOwn = require('./forOwn');    /**     * Copy missing properties in the obj from the defaults.     */    function fillIn(obj, var_defaults){        forEach(slice(arguments, 1), function(base){            forOwn(base, function(val, key){                if (obj[key] == null) {                    obj[key] = val;                }            });        });        return obj;    }    module.exports = fillIn;
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