code: function _mediaMatch(object, key, value) {
    if (!{}.hasOwnProperty.call(object, key)) {
      return false;
    }
    return Boolean(object[key].indexOf(value) >= 0);
  }
docs: Private: checks if value is already contained in a nested object.
  
  * `object` {Object} that might contain the value
  * `key` {String} key of the nested object that might contain the value
  * `value` {String} to check for
  
  Returns {Boolean}