text: const {method, oneArg, firstString} = require('../utils');
  const set = require('../set');
  
  module.exports = function not(schema, args, params = {}) {
  	const methodName = 'ref';
  	method(methodName);
  	oneArg(args);
  
  	return set(
  		schema,
  		['$' + methodName, args[0]],
  		{
  			methodName,
  			valueType: firstString,
  			...params,
  		}
  	);
  };