function getEnabledOptions( options ) {
  return Object.entries( options._enabled )
    .filter( pair => Boolean( pair[ 1 ]) )
    .reduce( ( carry, pair ) => {
      const key = pair[ 0 ];
      carry[ key ] = options[ key ];
      return carry;
    }, {});
}
Some assertions allow you to enable/disable params
In such case options._enabled map has information about what of params are enabled
{ key1: boolean }

@param {Object} options
@returns {Object}