function pickBy(object, predicate) {
      return object == null ? {} : basePickBy(object, getIteratee(predicate));
    }
Creates an object composed of the `object` properties `predicate` returns
truthy for. The predicate is invoked with two arguments: (value, key).

@static
@memberOf _
@since 4.0.0
@category Object
@param {Object} object The source object.
@param {Array|Function|Object|string} [predicate=_.identity]
 The function invoked per property.
@returns {Object} Returns the new object.
@example

var object = { 'a': 1, 'b': '2', 'c': 3 };

_.pickBy(object, _.isNumber);
// => { 'a': 1, 'c': 3 }